Properties of the Number 7155

Seven Thousand One Hundred Fifty-Five

Basics

Value: 7154 → 7155 → 7156

Parity: odd

Prime: No

Previous Prime: 7151

Next Prime: 7159

Digit Sum: 18

Digital Root: 9

Palindrome: No

Factorization: 3 ³ × 5 × 53

Divisors: 1, 3, 5, 9, 15, 27, 45, 53, 135, 159

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 1101111110011

Octal: 15763

Duodecimal: 4183

Hexadecimal: 1bf3

Square: 51194025

Square Root: 84.5872330792301

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

Number of n-bead necklaces (turning over is allowed) where complements are equivalent. A11

Multiples of 15 containing a 15 in their decimal representation. A121035

Generalized 21-gonal (or icosihenagonal) numbers: m*(19·m - 17)/2 with m = 0, +1, -1, +2, -2, +3, -3, ... A303298

Generalized Stirling number triangle of first kind read by rows: T(n, k) = [x^k] ∏_m=1..n (x - m - r), with r = 6. A51339

a(n) = n*(7·n+3)/2. A186029

MacMahon's generalized sum of divisors function. A2127

Numbers k such that 2^k + 33 is prime. A247953

Numbers n such that there are precisely 5 groups of orders n and n + 1. A295991

Sum of the largest parts in the partitions of n into 7 squarefree parts. A308960

Numbers that are the sum of five third powers in eight or more ways. A345183