22500621 has 24 divisors (see below), whose sum is σ = 38185056. Its totient is φ = 12587040.

The previous prime is 22500613. The next prime is 22500623. The reversal of 22500621 is 12600522.

It is not a de Polignac number, because 22500621 - 2³ = 22500613 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22500594 and 22500603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22500623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7455 + ... + 10028.

It is an arithmetic number, because the mean of its divisors is an integer number (1591044).

Almost surely, 2^22500621 is an apocalyptic number.

It is an amenable number.

22500621 is a deficient number, since it is larger than the sum of its proper divisors (15684435).

22500621 is a wasteful number, since it uses less digits than its factorization.

22500621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17513 (or 17510 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 22500621 is about 4743.4819489485. The cubic root of 22500621 is about 282.3134058999.

Subtracting from 22500621 its reverse (12600522), we obtain a palindrome (9900099).

The spelling of 22500621 in words is "twenty-two million, five hundred thousand, six hundred twenty-one".