Properties of the Number 69221

Sixty-Nine Thousand Two Hundred Twenty-One

Basics

Value: 69220 → 69221 → 69222

Parity: odd

Prime: Yes

Previous Prime: 69203

Next Prime: 69233

Digit Sum: 20

Digital Root: 2

Palindrome: No

Factorization: 69221

Divisors: 1, 69221

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 10000111001100101

Octal: 207145

Duodecimal: 34085

Hexadecimal: 10e65

Square: 4791546841

Square Root: 263.09884074240995

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

The first of three consecutive primes the sum of which is equal to the sum of three consecutive pentagonal numbers. A298251

Primes in A168472. A168473

a(n) = ∑_i=0..n/2((binomial(2·i+1,i)*binomial(2·n+2,n-2·i))/(2·i+1)). A270560

Prime numbers followed by two consecutive numbers which are products of four distinct primes (or tetraprimes). A362578

a(1) = a(2) = 1; a(n) = <>(a(n-1)) + <>(a(n-2)) for n > 2, where <>(k) denotes the concatenation of k with itself. A69221