251445252 has 48 divisors (see below), whose sum is σ = 602300160. Its totient is φ = 81600288.

The previous prime is 251445239. The next prime is 251445277. The reversal of 251445252 is 252544152.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215623 + ... + 216785.

It is an arithmetic number, because the mean of its divisors is an integer number (12547920).

Almost surely, 2^251445252 is an apocalyptic number.

It is an amenable number.

251445252 is an abundant number, since it is smaller than the sum of its proper divisors (350854908).

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

251445252 is a wasteful number, since it uses less digits than its factorization.

251445252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632 (or 1630 counting only the distinct ones).

The product of its digits is 16000, while the sum is 30.

The square root of 251445252 is about 15857.0253200277. The cubic root of 251445252 is about 631.1721287858.

The spelling of 251445252 in words is "two hundred fifty-one million, four hundred forty-five thousand, two hundred fifty-two".