251082 has 48 divisors (see below), whose sum is σ = 622440. Its totient is φ = 72576.

The previous prime is 251081. The next prime is 251087. The reversal of 251082 is 280152.

It can be written as a sum of positive squares in 4 ways, for example, as 221841 + 29241 = 471^2 + 171^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251081) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6768 + ... + 6804.

2²⁵¹⁰⁸² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 251082, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311220).

251082 is an abundant number, since it is smaller than the sum of its proper divisors (371358).

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

251082 is a wasteful number, since it uses less digits than its factorization.

251082 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 251082 is about 501.0808318026. The cubic root of 251082 is about 63.0868040013.

The spelling of 251082 in words is "two hundred fifty-one thousand, eighty-two".