251364872 has 16 divisors (see below), whose sum is σ = 514155600. Its totient is φ = 114256720.

The previous prime is 251364871. The next prime is 251364901. The reversal of 251364872 is 278463152.

It is a happy number.

251364872 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (251364871) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1428122 + ... + 1428297.

It is an arithmetic number, because the mean of its divisors is an integer number (32134725).

Almost surely, 2^251364872 is an apocalyptic number.

251364872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

251364872 is an abundant number, since it is smaller than the sum of its proper divisors (262790728).

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

251364872 is a wasteful number, since it uses less digits than its factorization.

251364872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2856436 (or 2856432 counting only the distinct ones).

The product of its digits is 80640, while the sum is 38.

The square root of 251364872 is about 15854.4905941503. The cubic root of 251364872 is about 631.1048656045.

The spelling of 251364872 in words is "two hundred fifty-one million, three hundred sixty-four thousand, eight hundred seventy-two".