Properties of the Number 40157

Forty Thousand One Hundred Fifty-Seven

Basics

Value: 40156 → 40157 → 40158

Parity: odd

Prime: No

Previous Prime: 40153

Next Prime: 40163

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 13 × 3089

Divisors: 1, 13, 3089, 40157

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 1001110011011101

Octal: 116335

Duodecimal: 1B2A5

Hexadecimal: 9cdd

Square: 1612584649

Square Root: 200.39211561336438

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Smallest m such that A051145(m) = 2ⁿ. A51147

Positions at which powers of 2 occur in A051145. A244747

Number of nonempty subsets of {1, 2, ..., n} with <=5 pairwise coprime elements. A187266

a(n) = a(n-1) + a(n-2) + 2 a(ceiling(n/2)), where a(0) = 1, a(1) = 2, a(2) = 3. A298351

Numbers k such that 8·10^k + 6·R_k + 3 is prime, where R_k = 11...1 is the repunit (A002275) of length k. A103088

Discriminants of real quadratic fields with class number 2 and related continued fraction period length of 11. A51976

Numbers n such that either prime(n-1) == -1 (mod n) or prime(n+1) == -1 (mod n) but not both. A225318

Continued fraction for sqrt(171). A40157