251000164 has 12 divisors (see below), whose sum is σ = 441790524. Its totient is φ = 124774304.

The previous prime is 251000161. The next prime is 251000179. The reversal of 251000164 is 461000152.

It can be written as a sum of positive squares in 2 ways, for example, as 215502400 + 35497764 = 14680^2 + 5958^2 .

It is not an unprimeable number, because it can be changed into a prime (251000161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 180667 + ... + 182050.

It is an arithmetic number, because the mean of its divisors is an integer number (36815877).

Almost surely, 2^251000164 is an apocalyptic number.

It is an amenable number.

251000164 is a deficient number, since it is larger than the sum of its proper divisors (190790360).

251000164 is a wasteful number, since it uses less digits than its factorization.

251000164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362894 (or 362892 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 19.

The square root of 251000164 is about 15842.9846935481. The cubic root of 251000164 is about 630.7994922515.

The spelling of 251000164 in words is "two hundred fifty-one million, one hundred sixty-four", and thus it is an aban number.