25302531220 has 24 divisors (see below), whose sum is σ = 53155116000. Its totient is φ = 10117240992.

The previous prime is 25302531143. The next prime is 25302531251. The reversal of 25302531220 is 2213520352.

It is a super-2 number, since 2×25302531220² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 180390 + ... + 288349.

It is an arithmetic number, because the mean of its divisors is an integer number (2214796500).

Almost surely, 2^25302531220 is an apocalyptic number.

25302531220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25302531220 is an abundant number, since it is smaller than the sum of its proper divisors (27852584780).

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

25302531220 is a wasteful number, since it uses less digits than its factorization.

25302531220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471447 (or 471445 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

The spelling of 25302531220 in words is "twenty-five billion, three hundred two million, five hundred thirty-one thousand, two hundred twenty".