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156 is the number following 155 and preceding 157[1].

Properties[]

  • 156 is a pronic number.[10]
  • 156 is abundant.[11]
  • Its prime factorization is 22 × 31 × 131.


Approximations[]

Notation Lower bound Upper bound
Up-arrow notation 12 ↑ 2
Scientific notation 1.56 x 102 1.561 x 102
Slow-growing hierarchy \(g_{\omega^{\omega}}(3)\) \(g_{\omega^{\omega}}(4)\)
Copy notation 1[3] 2[3]
Chained arrow notation 12 → 2
Bowers' Exploding Array Function/Bird's array notation {12,2}
Fast-growing hierarchy f1(77) f1(78)
Hardy hierarchy Hω(78) Hω(78)
Middle-growing hierarchy m(ω,7) m(ω,8)
Hyper-E notation E2.1931
Hyper-E notation (non-10 base) \(E[12]2\)
Hyperfactorial array notation 5! 6!
X-Sequence Hyper-Exponential Notation 12{1}2
Steinhaus-Moser Notation 3[3] 4[3]
PlantStar's Debut Notation [1] [2]
H* function H(-0.3) H(-0.2)
Bashicu matrix system with respect to version 4 (0)[12] (0)[13]
m(n) map m(1)(3) m(1)(4)
s(n) map \(s(1)(\lambda x . x+1)(77)\) \(s(1)(\lambda x . x+1)(78)\)

Sources[]