25520220522 has 24 divisors (see below), whose sum is σ = 55307974176. Its totient is φ = 8504561256.

The previous prime is 25520220511. The next prime is 25520220527. The reversal of 25520220522 is 22502202552.

25520220522 is a `hidden beast` number, since 255 + 202 + 205 + 2 + 2 = 666.

It is not an unprimeable number, because it can be changed into a prime (25520220527) 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, 108558 + ... + 250649.

It is an arithmetic number, because the mean of its divisors is an integer number (2304498924).

Almost surely, 2^25520220522 is an apocalyptic number.

25520220522 is an abundant number, since it is smaller than the sum of its proper divisors (29787753654).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25520220522 is a wasteful number, since it uses less digits than its factorization.

25520220522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363162 (or 363159 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The spelling of 25520220522 in words is "twenty-five billion, five hundred twenty million, two hundred twenty thousand, five hundred twenty-two".