25500502220 has 48 divisors (see below), whose sum is σ = 54968106816. Its totient is φ = 9933600000.

The previous prime is 25500502187. The next prime is 25500502249. The reversal of 25500502220 is 2220500552.

It is a happy number.

It is a super-2 number, since 2×25500502220² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19745 + ... + 226695.

It is an arithmetic number, because the mean of its divisors is an integer number (1145168892).

Almost surely, 2^25500502220 is an apocalyptic number.

25500502220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25500502220 is an abundant number, since it is smaller than the sum of its proper divisors (29467604596).

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

25500502220 is a wasteful number, since it uses less digits than its factorization.

25500502220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 207122 (or 207120 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 23.

The spelling of 25500502220 in words is "twenty-five billion, five hundred million, five hundred two thousand, two hundred twenty".