Properties of the Number 21353

Twenty-One Thousand Three Hundred Fifty-Three

Basics

Value: 21352 → 21353 → 21354

Parity: odd

Prime: No

Previous Prime: 21347

Next Prime: 21377

Digit Sum: 14

Digital Root: 5

Palindrome: No

Factorization: 131 × 163

Divisors: 1, 131, 163, 21353

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101001101101001

Octal: 51551

Duodecimal: 10435

Hexadecimal: 5369

Square: 455950609

Square Root: 146.12665739008744

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

Maximum value of the cyclic convolution of first n primes with themselves. A299111

Semiprimes whose prime factors are of equal binary length and which differ from each other in one bit position only. A261073

Numbers k such that k³ has only odd digits. A30099

Semiprimes whose prime factors differ from each other in one bit position only. A261077

Squarefree numbers (A005117) of form prime(k)*q where q = primes of the form prime(k) + k. A232170

"Fibonacci-digits": start with "11", append sum of first 2 digits to the preceding number, drop first digit. A93099

a(n) = A100092(n²+1). A100093

Squarefree numbers (A005117) with prime factors in a prime(k) + k progression. A232169

sin(arcsinh(x)*exp(x)) = x+2/2!*x²+1/3!*x³-12/4!*x⁴-75/5!*x⁵... A12585

Smallest multiple of (n+1)-st prime which is == 1 mod n-th prime. A73604