251042608 has 40 divisors (see below), whose sum is σ = 512119008. Its totient is φ = 118981632.

The previous prime is 251042599. The next prime is 251042629. The reversal of 251042608 is 806240152.

It is a hoax number, since the sum of its digits (28) coincides with the sum of the digits of its distinct 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, 38566 + ... + 44602.

Almost surely, 2^251042608 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251042608, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (256059504).

251042608 is an abundant number, since it is smaller than the sum of its proper divisors (261076400).

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

251042608 is a wasteful number, since it uses less digits than its factorization.

251042608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6181 (or 6175 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 251042608 is about 15844.3241572495. The cubic root of 251042608 is about 630.8350462053.

The spelling of 251042608 in words is "two hundred fifty-one million, forty-two thousand, six hundred eight".