251651152 has 20 divisors (see below), whose sum is σ = 488063380. Its totient is φ = 125699328.

The previous prime is 251651137. The next prime is 251651173. The reversal of 251651152 is 251156152.

It can be written as a sum of positive squares in 2 ways, for example, as 153165376 + 98485776 = 12376^2 + 9924^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 251651152.

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 3 ways as a sum of consecutive naturals, for example, 9748 + ... + 24460.

It is an arithmetic number, because the mean of its divisors is an integer number (24403169).

Almost surely, 2^251651152 is an apocalyptic number.

It is an amenable number.

251651152 is a deficient number, since it is larger than the sum of its proper divisors (236412228).

251651152 is a wasteful number, since it uses less digits than its factorization.

251651152 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15790 (or 15784 counting only the distinct ones).

The product of its digits is 3000, while the sum is 28.

The square root of 251651152 is about 15863.5163819375. The cubic root of 251651152 is about 631.3443636078.

The spelling of 251651152 in words is "two hundred fifty-one million, six hundred fifty-one thousand, one hundred fifty-two".