22515004525 has 12 divisors (see below), whose sum is σ = 30066191092. Its totient is φ = 16626464640.

The previous prime is 22515004517. The next prime is 22515004529. The reversal of 22515004525 is 52540051522.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 5809183524 + 16705821001 = 76218^2 + 129251^2 .

It is not a de Polignac number, because 22515004525 - 2³ = 22515004517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22515004529) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 34638144 + ... + 34638793.

Almost surely, 2^22515004525 is an apocalyptic number.

22515004525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22515004525 is a deficient number, since it is larger than the sum of its proper divisors (7551186567).

22515004525 is a wasteful number, since it uses less digits than its factorization.

22515004525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69276960 (or 69276955 counting only the distinct ones).

The product of its (nonzero) digits is 20000, while the sum is 31.

The spelling of 22515004525 in words is "twenty-two billion, five hundred fifteen million, four thousand, five hundred twenty-five".