251713 has 12 divisors (see below), whose sum is σ = 320112. Its totient is φ = 195720.

The previous prime is 251707. The next prime is 251737. The reversal of 251713 is 317152.

It is not a de Polignac number, because 251713 - 2⁹ = 251201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 306 + ... + 772.

It is an arithmetic number, because the mean of its divisors is an integer number (26676).

2²⁵¹⁷¹³ is an apocalyptic number.

It is an amenable number.

251713 is a deficient number, since it is larger than the sum of its proper divisors (68399).

251713 is a wasteful number, since it uses less digits than its factorization.

251713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 492 (or 485 counting only the distinct ones).

The product of its digits is 210, while the sum is 19.

The square root of 251713 is about 501.7100756413. The cubic root of 251713 is about 63.1396080952.

Adding to 251713 its reverse (317152), we get a palindrome (568865).

It can be divided in two parts, 2 and 51713, that added together give a palindrome (51715).

The spelling of 251713 in words is "two hundred fifty-one thousand, seven hundred thirteen".