251013253 has 4 divisors (see below), whose sum is σ = 251095680. Its totient is φ = 250930828.

The previous prime is 251013239. The next prime is 251013307. The reversal of 251013253 is 352310152.

251013253 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-251013253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (251017253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36463 + ... + 42796.

It is an arithmetic number, because the mean of its divisors is an integer number (62773920).

Almost surely, 2^251013253 is an apocalyptic number.

It is an amenable number.

251013253 is a deficient number, since it is larger than the sum of its proper divisors (82427).

251013253 is an equidigital number, since it uses as much as digits as its factorization.

251013253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82426.

The product of its (nonzero) digits is 900, while the sum is 22.

The square root of 251013253 is about 15843.3977732051. The cubic root of 251013253 is about 630.8104569071.

The spelling of 251013253 in words is "two hundred fifty-one million, thirteen thousand, two hundred fifty-three".