Properties of the Number 21662

Twenty-One Thousand Six Hundred Sixty-Two

Basics

Value: 21661 → 21662 → 21663

Parity: even

Prime: No

Previous Prime: 21661

Next Prime: 21673

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 2 × 10831

Divisors: 1, 2, 10831, 21662

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

2196 Try Today's Challenge

Representations

Binary: 101010010011110

Octal: 52236

Duodecimal: 10652

Hexadecimal: 549e

Square: 469242244

Square Root: 147.1801617066648

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) is the number of consecutive even prime gap pairs (g1, g2) satisfying g1 == 0 (mod 6) and g2 == 0 (mod 6) out of the first 2ⁿ consecutive even prime gap pairs. A345332

a(0) = 1, a(n) = 15·n² + 2 for n>0. A10005

Number of basis partitions of n+25 with Durfee square size 5. A53800

Numbers k such that k and k² use only the digits 1, 2, 4, 6 and 9. A136995

Convolution of A015723 and A000700. A274352

Number of odd chordless cycles in the n-antiprism graph. A301772

Decimal expansion of 1/658. A21662

Numbers k such that 2·3^k + 35 is prime. A59768