251230140156 has 48 divisors (see below), whose sum is σ = 628222984704. Its totient is φ = 77937431616.

The previous prime is 251230140079. The next prime is 251230140169. The reversal of 251230140156 is 651041032152.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12290520 + ... + 12310943.

It is an arithmetic number, because the mean of its divisors is an integer number (13087978848).

Almost surely, 2^251230140156 is an apocalyptic number.

It is an amenable number.

251230140156 is an abundant number, since it is smaller than the sum of its proper divisors (376992844548).

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

251230140156 is a wasteful number, since it uses less digits than its factorization.

251230140156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24601530 (or 24601528 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The spelling of 251230140156 in words is "two hundred fifty-one billion, two hundred thirty million, one hundred forty thousand, one hundred fifty-six".