251288 has 16 divisors (see below), whose sum is σ = 477360. Its totient is φ = 124000.

The previous prime is 251287. The next prime is 251291. The reversal of 251288 is 882152.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251287) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 653 + ... + 963.

It is an arithmetic number, because the mean of its divisors is an integer number (29835).

2²⁵¹²⁸⁸ is an apocalyptic number.

It is an amenable number.

251288 is a deficient number, since it is larger than the sum of its proper divisors (226072).

251288 is a wasteful number, since it uses less digits than its factorization.

251288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418 (or 414 counting only the distinct ones).

The product of its digits is 1280, while the sum is 26.

The square root of 251288 is about 501.2863453157. The cubic root of 251288 is about 63.1040524554.

The spelling of 251288 in words is "two hundred fifty-one thousand, two hundred eighty-eight".