251401052 has 24 divisors (see below), whose sum is σ = 506647680. Its totient is φ = 106919280.

The previous prime is 251401039. The next prime is 251401067. The reversal of 251401052 is 250104152.

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, 30602 + ... + 37937.

It is an arithmetic number, because the mean of its divisors is an integer number (21110320).

Almost surely, 2^251401052 is an apocalyptic number.

It is an amenable number.

251401052 is an abundant number, since it is smaller than the sum of its proper divisors (255246628).

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

251401052 is a wasteful number, since it uses less digits than its factorization.

251401052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68681 (or 68679 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 251401052 is about 15855.6315547505. The cubic root of 251401052 is about 631.1351433418.

The spelling of 251401052 in words is "two hundred fifty-one million, four hundred one thousand, fifty-two".