251940996 has 24 divisors (see below), whose sum is σ = 653180640. Its totient is φ = 83980296.

The previous prime is 251940989. The next prime is 251941013. The reversal of 251940996 is 699049152.

251940996 is a `hidden beast` number, since 2 + 519 + 40 + 9 + 96 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1166286 + ... + 1166501.

It is an arithmetic number, because the mean of its divisors is an integer number (27215860).

Almost surely, 2^251940996 is an apocalyptic number.

It is an amenable number.

251940996 is an abundant number, since it is smaller than the sum of its proper divisors (401239644).

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

251940996 is a wasteful number, since it uses less digits than its factorization.

251940996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2332800 (or 2332792 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 251940996 is about 15872.6493062752. The cubic root of 251940996 is about 631.5866582348.

The spelling of 251940996 in words is "two hundred fifty-one million, nine hundred forty thousand, nine hundred ninety-six".