251211052 has 12 divisors (see below), whose sum is σ = 448973280. Its totient is φ = 122932976.

The previous prime is 251211049. The next prime is 251211089. The reversal of 251211052 is 250112152.

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, 667927 + ... + 668302.

It is an arithmetic number, because the mean of its divisors is an integer number (37414440).

Almost surely, 2^251211052 is an apocalyptic number.

It is an amenable number.

251211052 is a deficient number, since it is larger than the sum of its proper divisors (197762228).

251211052 is a wasteful number, since it uses less digits than its factorization.

251211052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1336280 (or 1336278 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 19.

The square root of 251211052 is about 15849.6388602391. The cubic root of 251211052 is about 630.9761067502.

The spelling of 251211052 in words is "two hundred fifty-one million, two hundred eleven thousand, fifty-two".