251230896 has 280 divisors, whose sum is σ = 888005664. Its totient is φ = 67184640.

The previous prime is 251230877. The next prime is 251230919. The reversal of 251230896 is 698032152.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 251230896.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1387926 + ... + 1388106.

Almost surely, 2^251230896 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 251230896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (444002832).

251230896 is an abundant number, since it is smaller than the sum of its proper divisors (636774768).

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

251230896 is a wasteful number, since it uses less digits than its factorization.

251230896 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231 (or 210 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 251230896 is about 15850.2648558313. The cubic root of 251230896 is about 630.9927206161.

The spelling of 251230896 in words is "two hundred fifty-one million, two hundred thirty thousand, eight hundred ninety-six".