22515540525 has 36 divisors (see below), whose sum is σ = 41311457460. Its totient is φ = 11715398400.

The previous prime is 22515540517. The next prime is 22515540527. The reversal of 22515540525 is 52504551522.

22515540525 is a `hidden beast` number, since 2 + 2 + 51 + 554 + 0 + 52 + 5 = 666.

It can be written as a sum of positive squares in 6 ways, for example, as 440118441 + 22075422084 = 20979^2 + 148578^2 .

It is not a de Polignac number, because 22515540525 - 2³ = 22515540517 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22515540525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22515540527) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 1211130 + ... + 1229579.

It is an arithmetic number, because the mean of its divisors is an integer number (1147540485).

Almost surely, 2^22515540525 is an apocalyptic number.

22515540525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

22515540525 is a deficient number, since it is larger than the sum of its proper divisors (18795916935).

22515540525 is a wasteful number, since it uses less digits than its factorization.

22515540525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2440766 (or 2440758 counting only the distinct ones).

The product of its (nonzero) digits is 100000, while the sum is 36.

The spelling of 22515540525 in words is "twenty-two billion, five hundred fifteen million, five hundred forty thousand, five hundred twenty-five".