Properties of the Number 21958

Twenty-One Thousand Nine Hundred Fifty-Eight

Basics

Value: 21957 → 21958 → 21959

Parity: even

Prime: No

Previous Prime: 21943

Next Prime: 21961

Digit Sum: 25

Digital Root: 7

Palindrome: No

Factorization: 2 × 10979

Divisors: 1, 2, 10979, 21958

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010111000110

Octal: 52706

Duodecimal: 1085A

Hexadecimal: 55c6

Square: 482153764

Square Root: 148.1823201330037

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

a(n) = n³ + 6. A84382

Convolution of the prime numbers with φ(n). A86734

a(n) is the number of triangular partitions whose Young diagram fits inside a square of side n. A368638

Number of ways to write 2·n as an unordered sum of four primes with square indices. A389517

Decimal expansion of 1/954. A21958