22500521 has 8 divisors (see below), whose sum is σ = 22956864. Its totient is φ = 22047120.

The previous prime is 22500497. The next prime is 22500547. The reversal of 22500521 is 12500522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22500521 - 2²² = 18306217 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22500521.

It is not an unprimeable number, because it can be changed into a prime (22500581) 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 7 ways as a sum of consecutive naturals, for example, 20636 + ... + 21698.

It is an arithmetic number, because the mean of its divisors is an integer number (2869608).

Almost surely, 2^22500521 is an apocalyptic number.

It is an amenable number.

22500521 is a deficient number, since it is larger than the sum of its proper divisors (456343).

22500521 is a wasteful number, since it uses less digits than its factorization.

22500521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1471.

The product of its (nonzero) digits is 200, while the sum is 17.

The square root of 22500521 is about 4743.4714081567. The cubic root of 22500521 is about 282.3129876687.

Subtracting from 22500521 its reverse (12500522), we obtain a palindrome (9999999).

The spelling of 22500521 in words is "twenty-two million, five hundred thousand, five hundred twenty-one".