251982 has 12 divisors (see below), whose sum is σ = 546000. Its totient is φ = 83988.

The previous prime is 251971. The next prime is 251983. The reversal of 251982 is 289152.

251982 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251983) by changing a digit.

251982 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 6982 + ... + 7017.

It is an arithmetic number, because the mean of its divisors is an integer number (45500).

2²⁵¹⁹⁸² is an apocalyptic number.

251982 is an abundant number, since it is smaller than the sum of its proper divisors (294018).

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

251982 is a wasteful number, since it uses less digits than its factorization.

251982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14007 (or 14004 counting only the distinct ones).

The product of its digits is 1440, while the sum is 27.

The square root of 251982 is about 501.9780871711. The cubic root of 251982 is about 63.1620920456.

It can be divided in two parts, 25198 and 2, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 251982 in words is "two hundred fifty-one thousand, nine hundred eighty-two".