25312221352 has 24 divisors (see below), whose sum is σ = 52167235050. Its totient is φ = 11505554720.

The previous prime is 25312221307. The next prime is 25312221371.

25312221352 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in only one way, i.e., 22098011716 + 3214209636 = 148654^2 + 56694^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25312221352.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13073527 + ... + 13075462.

Almost surely, 2^25312221352 is an apocalyptic number.

25312221352 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

25312221352 is an abundant number, since it is smaller than the sum of its proper divisors (26855013698).

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

25312221352 is a wasteful number, since it uses less digits than its factorization.

25312221352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26149017 (or 26149002 counting only the distinct ones).

The product of its digits is 7200, while the sum is 28.

The spelling of 25312221352 in words is "twenty-five billion, three hundred twelve million, two hundred twenty-one thousand, three hundred fifty-two".