Properties of the Number 22381

Twenty-Two Thousand Three Hundred Eighty-One

Basics

Value: 22380 → 22381 → 22382

Parity: odd

Prime: Yes

Previous Prime: 22369

Next Prime: 22391

Digit Sum: 16

Digital Root: 7

Palindrome: No

Factorization: 22381

Divisors: 1, 22381

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

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Representations

Binary: 101011101101101

Octal: 53555

Duodecimal: 10B51

Hexadecimal: 576d

Square: 500909161

Square Root: 149.60280746028798

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

Smaller of two consecutive prime numbers such that p0+p1=average of twin prime pairs and p0·p1+7=average of twin prime pairs. A153374

Primes p such that 42·p-1, 42·p+1 and 48·p-1, 48·p+1 are twin primes. A138697

Numbers k such that ∑_i=1..k i⁶ divides ∏_i=1..k i⁶. A166606

Triangle read by rows: T(n,m) (n >= 1, 1 <= m <= n) = number of set partitions of [n], avoiding 123454, with m blocks. A250119

a(1) = 2; a(n)= smallest prime of the form k·a(n-1) + 1 where k itself is a multiple of n. A85873

Smallest prime P such that P# - Mersenne-prime(n) is prime. A98566

Numbers k such that 2^k modulo Fibonacci(k) is prime, i.e., A057862(k) is prime. A128161

a(n) = 62·n² - 1. A158680

Numbers k with maximal exponent in prime factorization equal to 1, such that k+1 has maximal exponent 2, k+2 has maximal exponent 3, and k+3 has maximal exponent 4. A176913

Number of distinct values of the sum of 2 products of three 0..n integers. A225259