251550423232 has 28 divisors (see below), whose sum is σ = 503749929760. Its totient is φ = 124621307136.

The previous prime is 251550423217. The next prime is 251550423251. The reversal of 251550423232 is 232324055152.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18022728 + ... + 18036679.

It is an arithmetic number, because the mean of its divisors is an integer number (17991068920).

Almost surely, 2^251550423232 is an apocalyptic number.

It is an amenable number.

251550423232 is an abundant number, since it is smaller than the sum of its proper divisors (252199506528).

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

251550423232 is a wasteful number, since it uses less digits than its factorization.

251550423232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36059528 (or 36059518 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 34.

Adding to 251550423232 its reverse (232324055152), we get a palindrome (483874478384).

The spelling of 251550423232 in words is "two hundred fifty-one billion, five hundred fifty million, four hundred twenty-three thousand, two hundred thirty-two".