251995996 has 24 divisors (see below), whose sum is σ = 515715200. Its totient is φ = 105486192.

The previous prime is 251995957. The next prime is 251996029. The reversal of 251995996 is 699599152.

251995996 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 103446 + ... + 105853.

Almost surely, 2^251995996 is an apocalyptic number.

It is an amenable number.

251995996 is an abundant number, since it is smaller than the sum of its proper divisors (263719204).

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

251995996 is a wasteful number, since it uses less digits than its factorization.

251995996 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209353 (or 209351 counting only the distinct ones).

The product of its digits is 1968300, while the sum is 55.

The square root of 251995996 is about 15874.3817517408. The cubic root of 251995996 is about 631.6326144167.

The spelling of 251995996 in words is "two hundred fifty-one million, nine hundred ninety-five thousand, nine hundred ninety-six".