251488 has 24 divisors (see below), whose sum is σ = 514080. Its totient is φ = 120960.

The previous prime is 251483. The next prime is 251491. The reversal of 251488 is 884152.

251488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251483) 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, 793 + ... + 1063.

It is an arithmetic number, because the mean of its divisors is an integer number (21420).

2²⁵¹⁴⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257040).

251488 is an abundant number, since it is smaller than the sum of its proper divisors (262592).

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

251488 is a wasteful number, since it uses less digits than its factorization.

251488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 310 (or 302 counting only the distinct ones).

The product of its digits is 2560, while the sum is 28.

The square root of 251488 is about 501.4857924209. The cubic root of 251488 is about 63.1207895110.

The spelling of 251488 in words is "two hundred fifty-one thousand, four hundred eighty-eight".