22521953 has 4 divisors (see below), whose sum is σ = 22561968. Its totient is φ = 22481940.

The previous prime is 22521931. The next prime is 22521971. The reversal of 22521953 is 35912522.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 22521953 - 2¹⁰ = 22520929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22521353) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19151 + ... + 20292.

It is an arithmetic number, because the mean of its divisors is an integer number (5640492).

Almost surely, 2^22521953 is an apocalyptic number.

It is an amenable number.

22521953 is a deficient number, since it is larger than the sum of its proper divisors (40015).

22521953 is an equidigital number, since it uses as much as digits as its factorization.

22521953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40014.

The product of its digits is 5400, while the sum is 29.

The square root of 22521953 is about 4745.7299754622. The cubic root of 22521953 is about 282.4025946590.

The spelling of 22521953 in words is "twenty-two million, five hundred twenty-one thousand, nine hundred fifty-three".