251368 has 16 divisors (see below), whose sum is σ = 507780. Its totient is φ = 115968.

The previous prime is 251359. The next prime is 251387. The reversal of 251368 is 863152.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 248004 + 3364 = 498^2 + 58^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1105 + ... + 1312.

2²⁵¹³⁶⁸ is an apocalyptic number.

It is an amenable number.

251368 is an abundant number, since it is smaller than the sum of its proper divisors (256412).

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

251368 is a wasteful number, since it uses less digits than its factorization.

251368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2436 (or 2432 counting only the distinct ones).

The product of its digits is 1440, while the sum is 25.

The square root of 251368 is about 501.3661336788. The cubic root of 251368 is about 63.1107483430.

The spelling of 251368 in words is "two hundred fifty-one thousand, three hundred sixty-eight".