22515970 has 16 divisors (see below), whose sum is σ = 41518008. Its totient is φ = 8786560.

The previous prime is 22515923. The next prime is 22515971. The reversal of 22515970 is 7951522.

It can be written as a sum of positive squares in 4 ways, for example, as 10426441 + 12089529 = 3229^2 + 3477^2 .

It is not an unprimeable number, because it can be changed into a prime (22515971) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27049 + ... + 27868.

Almost surely, 2^22515970 is an apocalyptic number.

22515970 is a deficient number, since it is larger than the sum of its proper divisors (19002038).

22515970 is a wasteful number, since it uses less digits than its factorization.

22515970 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54965.

The product of its (nonzero) digits is 6300, while the sum is 31.

The square root of 22515970 is about 4745.0995774588. The cubic root of 22515970 is about 282.3775855140.

The spelling of 22515970 in words is "twenty-two million, five hundred fifteen thousand, nine hundred seventy".