251295378 has 32 divisors (see below), whose sum is σ = 529877376. Its totient is φ = 79292928.

The previous prime is 251295347. The next prime is 251295403. The reversal of 251295378 is 873592152.

It is a happy number.

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 15 ways as a sum of consecutive naturals, for example, 4000 + ... + 22772.

It is an arithmetic number, because the mean of its divisors is an integer number (16558668).

Almost surely, 2^251295378 is an apocalyptic number.

251295378 is an abundant number, since it is smaller than the sum of its proper divisors (278581998).

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

251295378 is a wasteful number, since it uses less digits than its factorization.

251295378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18898.

The product of its digits is 151200, while the sum is 42.

The square root of 251295378 is about 15852.2988238299. The cubic root of 251295378 is about 631.0467004314.

The spelling of 251295378 in words is "two hundred fifty-one million, two hundred ninety-five thousand, three hundred seventy-eight".