251161896 has 16 divisors (see below), whose sum is σ = 627904800. Its totient is φ = 83720624.

The previous prime is 251161873. The next prime is 251161903. The reversal of 251161896 is 698161152.

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, 5232516 + ... + 5232563.

It is an arithmetic number, because the mean of its divisors is an integer number (39244050).

Almost surely, 2^251161896 is an apocalyptic number.

It is an amenable number.

251161896 is an abundant number, since it is smaller than the sum of its proper divisors (376742904).

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

251161896 is a wasteful number, since it uses less digits than its factorization.

251161896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10465088 (or 10465084 counting only the distinct ones).

The product of its digits is 25920, while the sum is 39.

The square root of 251161896 is about 15848.0880865800. The cubic root of 251161896 is about 630.9349484167.

The spelling of 251161896 in words is "two hundred fifty-one million, one hundred sixty-one thousand, eight hundred ninety-six".