251315260 has 24 divisors (see below), whose sum is σ = 603156960. Its totient is φ = 86165184.

The previous prime is 251315243. The next prime is 251315269. The reversal of 251315260 is 62513152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251315269) 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, 897415 + ... + 897694.

It is an arithmetic number, because the mean of its divisors is an integer number (25131540).

Almost surely, 2^251315260 is an apocalyptic number.

251315260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251315260 is an abundant number, since it is smaller than the sum of its proper divisors (351841700).

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

251315260 is a wasteful number, since it uses less digits than its factorization.

251315260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1795125 (or 1795123 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 251315260 is about 15852.9259129033. The cubic root of 251315260 is about 631.0633423871.

The spelling of 251315260 in words is "two hundred fifty-one million, three hundred fifteen thousand, two hundred sixty".