251952313 has 4 divisors (see below), whose sum is σ = 253082368. Its totient is φ = 250822260.

The previous prime is 251952271. The next prime is 251952329. The reversal of 251952313 is 313259152.

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 not a de Polignac number, because 251952313 - 2⁹ = 251951801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251952343) 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, 564693 + ... + 565138.

It is an arithmetic number, because the mean of its divisors is an integer number (63270592).

Almost surely, 2^251952313 is an apocalyptic number.

It is an amenable number.

251952313 is a deficient number, since it is larger than the sum of its proper divisors (1130055).

251952313 is a wasteful number, since it uses less digits than its factorization.

251952313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1130054.

The product of its digits is 8100, while the sum is 31.

The square root of 251952313 is about 15873.0057960047. The cubic root of 251952313 is about 631.5961148924.

The spelling of 251952313 in words is "two hundred fifty-one million, nine hundred fifty-two thousand, three hundred thirteen".