251120166 has 32 divisors (see below), whose sum is σ = 557193600. Its totient is φ = 74806080.

The previous prime is 251120159. The next prime is 251120171. The reversal of 251120166 is 661021152.

It is a super-2 number, since 2×251120166² = 126122675543735112, which contains 22 as substring.

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, 28351 + ... + 36138.

It is an arithmetic number, because the mean of its divisors is an integer number (17412300).

Almost surely, 2^251120166 is an apocalyptic number.

251120166 is an abundant number, since it is smaller than the sum of its proper divisors (306073434).

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

251120166 is a wasteful number, since it uses less digits than its factorization.

251120166 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64564.

The product of its (nonzero) digits is 720, while the sum is 24.

The square root of 251120166 is about 15846.7714692930. The cubic root of 251120166 is about 630.9000036605.

The spelling of 251120166 in words is "two hundred fifty-one million, one hundred twenty thousand, one hundred sixty-six".