251197116 has 12 divisors (see below), whose sum is σ = 586126632. Its totient is φ = 83732368.

The previous prime is 251197109. The next prime is 251197147. The reversal of 251197116 is 611791152.

It is a tau number, because it is divible by the number of its divisors (12).

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 in 3 ways as a sum of consecutive naturals, for example, 10466535 + ... + 10466558.

It is an arithmetic number, because the mean of its divisors is an integer number (48843886).

Almost surely, 2^251197116 is an apocalyptic number.

It is an amenable number.

251197116 is an abundant number, since it is smaller than the sum of its proper divisors (334929516).

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

251197116 is a wasteful number, since it uses less digits than its factorization.

251197116 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20933100 (or 20933098 counting only the distinct ones).

The product of its digits is 3780, while the sum is 33.

The square root of 251197116 is about 15849.1992226737. The cubic root of 251197116 is about 630.9644386786.

The spelling of 251197116 in words is "two hundred fifty-one million, one hundred ninety-seven thousand, one hundred sixteen".