251013 has 8 divisors (see below), whose sum is σ = 382528. Its totient is φ = 143424.

The previous prime is 251003. The next prime is 251033. The reversal of 251013 is 310152.

251013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 251013 - 2⁶ = 250949 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 251013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251003) 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, 5956 + ... + 5997.

It is an arithmetic number, because the mean of its divisors is an integer number (47816).

2²⁵¹⁰¹³ is an apocalyptic number.

It is an amenable number.

251013 is a deficient number, since it is larger than the sum of its proper divisors (131515).

251013 is a wasteful number, since it uses less digits than its factorization.

251013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11963.

The product of its (nonzero) digits is 30, while the sum is 12.

The square root of 251013 is about 501.0119759048. The cubic root of 251013 is about 63.0810244973.

Subtracting from 251013 its sum of digits (12), we obtain a square (251001 = 501²).

Adding to 251013 its reverse (310152), we get a palindrome (561165).

It can be divided in two parts, 2 and 51013, that added together give a palindrome (51015).

The spelling of 251013 in words is "two hundred fifty-one thousand, thirteen".