251298256 has 40 divisors (see below), whose sum is σ = 559116000. Its totient is φ = 108213120.

The previous prime is 251298251. The next prime is 251298259. The reversal of 251298256 is 652892152.

251298256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251298251) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34231 + ... + 40918.

It is an arithmetic number, because the mean of its divisors is an integer number (13977900).

Almost surely, 2^251298256 is an apocalyptic number.

It is an amenable number.

251298256 is an abundant number, since it is smaller than the sum of its proper divisors (307817744).

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

251298256 is a wasteful number, since it uses less digits than its factorization.

251298256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75187 (or 75181 counting only the distinct ones).

The product of its digits is 86400, while the sum is 40.

The square root of 251298256 is about 15852.3895990478. The cubic root of 251298256 is about 631.0491094762.

The spelling of 251298256 in words is "two hundred fifty-one million, two hundred ninety-eight thousand, two hundred fifty-six".