Properties of the Number -1651

Six Hundred Fifty-One

Basics

Value: -1652 → -1651 → -1650

Parity: odd

Prime: No

Previous Prime:

Next Prime: 1

Digit Sum: 13

Digital Root: 4

Palindrome: No

Factorization: 13 × 127

Divisors: 1, 13, 127, 1651

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: Yes

Tetrahedral: No

Today's Target

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Representations

Binary: -11001110011

Octal: -3163

Duodecimal: -B57

Hexadecimal: -673

Square: 2725801

Square Root: 40.63249930782009

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

First differences of number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 233", based on the 5-celled von Neumann neighborhood. A270979

Heptagonal numbers (or 7-gonal numbers): n*(5·n-3)/2. A566

Generalized heptagonal numbers: m*(5·m - 3)/2, m = 0, +-1, +-2 +-3, ... A85787

Sum of divisors of square numbers. A65764

a(n) = least k >= 1 such that the remainder when 6^k is divided by k is n. A127816

Numbers that are the sum of 6 positive 6th powers. A3362

Numbers k such that both k and k + 1 are Niven numbers. A330927

Coefficient of x⁴ in expansion of (1+x+x²)ⁿ. A5712

Generalized 23-gonal (or icositrigonal) numbers: m*(21·m - 19)/2 with m = 0, +1, -1, +2, -2, +3, -3, ... A303303

Write n in binary, then increase each run of 0's by one 0, and increase each run of 1's by one 1. a(n) is the decimal equivalent of the result. A175046