Properties of the Number 22481

Twenty-Two Thousand Four Hundred Eighty-One

Basics

Value: 22480 → 22481 → 22482

Parity: odd

Prime: Yes

Previous Prime: 22469

Next Prime: 22483

Digit Sum: 17

Digital Root: 8

Palindrome: No

Factorization: 22481

Divisors: 1, 22481

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101011111010001

Octal: 53721

Duodecimal: 11015

Hexadecimal: 57d1

Square: 505395361

Square Root: 149.93665329064805

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 for which the period of reciprocal = (p-1)/8. A56213

Numbers k such that σ(φ(k)) - φ(σ(k)) is nonzero and divisible by σ(k), that is A065395(k)/A000203(k) is a nonzero integer. A92588

Numbers k such that σ(φ(k))-φ(σ(k)) is nonzero and is divisible by (k+1), that is A065395(k)/(k+1) = (φ(σ(k))-σ(φ(k)))/(k+1) is a nonzero integer. A92586

Primes p such that p = q² + 8·r² where q and r are also primes. A260556

a(n) = exp(-1/2) * ∑_k>=0 H_n(k) / (k!*2^k), where H_n(x) is n-th Hermite polynomial. A316778

Primes p such that 2^p-1 and the p-th Fibonacci number have a common factor. Prime terms of A074776. A80050

Primes of the form abs(103·n² - 4707·n + 50383) in order of increasing nonnegative n. A267252

Let F(g,p) be the frequency of g up to prime nextprime(p+1). Primes p such that F(2,p) = F(4,p) and g = 2 or 4. A274122

Number of partitions of n such that the number of parts and the smallest part are not coprime. A201025

a(n) = 25·n² + 15·n + 1021. A214732