Properties of the Number 1531

One Thousand Five Hundred Thirty-One

Basics

Value: 1530 → 1531 → 1532

Parity: odd

Prime: Yes

Previous Prime: 1523

Next Prime: 1543

Digit Sum: 10

Digital Root: 1

Palindrome: No

Factorization: 1531

Divisors: 1, 1531

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2730 Try Today's Challenge

Representations

Binary: 10111111011

Octal: 2773

Duodecimal: A77

Hexadecimal: 5fb

Square: 2343961

Square Root: 39.1279950930277

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

Primes p such that 2p-1 is also prime. A5382

Primes p such that the decimal expansion of its base-9 conversion is also prime. A65727

Primes whose base-2 representation is also the base-3 representation of a prime. A235266

Primes whose decimal representation is a valid number in base 8 and interpreted as such is again a prime. A235394

Coordination sequence for "pcu-i" 3D uniform tiling. A299277

Primes p such that q = (p² + 1)/2 is also a prime. A48161

Primes of the form 4·x²+x·y-4·y² (as well as of the form 4·x²+9·x*y+y²). A141111

Centered 10-gonal numbers. A62786

Numbers that are the sum of 12 positive 6th powers. A3368

7th-order Fibonacci numbers with a(0)=...=a(6)=1. A60455