251295480 has 64 divisors (see below), whose sum is σ = 837655200. Its totient is φ = 67011840.

The previous prime is 251295461. The next prime is 251295481. The reversal of 251295480 is 84592152.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251295481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 115261 + ... + 117420.

Almost surely, 2^251295480 is an apocalyptic number.

251295480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

251295480 is an abundant number, since it is smaller than the sum of its proper divisors (586359720).

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

251295480 is a wasteful number, since it uses less digits than its factorization.

251295480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 232701 (or 232691 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 251295480 is about 15852.3020410286. The cubic root of 251295480 is about 631.0467858113.

The spelling of 251295480 in words is "two hundred fifty-one million, two hundred ninety-five thousand, four hundred eighty".