251802 has 16 divisors (see below), whose sum is σ = 559680. Its totient is φ = 83916.

The previous prime is 251791. The next prime is 251809. The reversal of 251802 is 208152.

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

It is not an unprimeable number, because it can be changed into a prime (251809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2278 + ... + 2385.

It is an arithmetic number, because the mean of its divisors is an integer number (34980).

2²⁵¹⁸⁰² is an apocalyptic number.

251802 is an abundant number, since it is smaller than the sum of its proper divisors (307878).

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

251802 is a wasteful number, since it uses less digits than its factorization.

251802 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4674 (or 4668 counting only the distinct ones).

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

The square root of 251802 is about 501.7987644465. The cubic root of 251802 is about 63.1470487955.

Adding to 251802 its reverse (208152), we get a palindrome (459954).

The spelling of 251802 in words is "two hundred fifty-one thousand, eight hundred two".