251255672 has 8 divisors (see below), whose sum is σ = 471104400. Its totient is φ = 125627832.

The previous prime is 251255659. The next prime is 251255761. The reversal of 251255672 is 276552152.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15703472 + ... + 15703487.

It is an arithmetic number, because the mean of its divisors is an integer number (58888050).

Almost surely, 2^251255672 is an apocalyptic number.

It is an amenable number.

251255672 is a deficient number, since it is larger than the sum of its proper divisors (219848728).

251255672 is a wasteful number, since it uses less digits than its factorization.

251255672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31406965 (or 31406961 counting only the distinct ones).

The product of its digits is 42000, while the sum is 35.

The square root of 251255672 is about 15851.0464007901. The cubic root of 251255672 is about 631.0134624410.

The spelling of 251255672 in words is "two hundred fifty-one million, two hundred fifty-five thousand, six hundred seventy-two".