251345052 has 48 divisors (see below), whose sum is σ = 744728320. Its totient is φ = 71812656.

The previous prime is 251344997. The next prime is 251345077. The reversal of 251345052 is 250543152.

It is a happy number.

251345052 is a `hidden beast` number, since 25 + 134 + 505 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 165478 + ... + 166989.

Almost surely, 2^251345052 is an apocalyptic number.

It is an amenable number.

251345052 is an abundant number, since it is smaller than the sum of its proper divisors (493383268).

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

251345052 is a wasteful number, since it uses less digits than its factorization.

251345052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332487 (or 332479 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 27.

The square root of 251345052 is about 15853.8655223261. The cubic root of 251345052 is about 631.0882777296.

The spelling of 251345052 in words is "two hundred fifty-one million, three hundred forty-five thousand, fifty-two".