25351207220 has 24 divisors (see below), whose sum is σ = 53301024000. Its totient is φ = 10128389792.

The previous prime is 25351207213. The next prime is 25351207241. The reversal of 25351207220 is 2270215352.

It is a super-2 number, since 2×25351207220² (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, 738620 + ... + 772179.

It is an arithmetic number, because the mean of its divisors is an integer number (2220876000).

Almost surely, 2^25351207220 is an apocalyptic number.

25351207220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25351207220 is an abundant number, since it is smaller than the sum of its proper divisors (27949816780).

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

25351207220 is a wasteful number, since it uses less digits than its factorization.

25351207220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1511647 (or 1511645 counting only the distinct ones).

The product of its (nonzero) digits is 8400, while the sum is 29.

The spelling of 25351207220 in words is "twenty-five billion, three hundred fifty-one million, two hundred seven thousand, two hundred twenty".