251530260 has 48 divisors (see below), whose sum is σ = 713944896. Its totient is φ = 66154752.

The previous prime is 251530259. The next prime is 251530273. The reversal of 251530260 is 62035152.

251530260 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 251530260.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 24334 + ... + 33093.

It is an arithmetic number, because the mean of its divisors is an integer number (14873852).

Almost surely, 2^251530260 is an apocalyptic number.

251530260 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251530260 is an abundant number, since it is smaller than the sum of its proper divisors (462414636).

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

251530260 is a wasteful number, since it uses less digits than its factorization.

251530260 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57512 (or 57510 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 251530260 is about 15859.7055458164. The cubic root of 251530260 is about 631.2432491517.

The spelling of 251530260 in words is "two hundred fifty-one million, five hundred thirty thousand, two hundred sixty".