251350013 has 2 divisors, whose sum is σ = 251350014. Its totient is φ = 251350012.

The previous prime is 251349997. The next prime is 251350019. The reversal of 251350013 is 310053152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205692964 + 45657049 = 14342^2 + 6757^2 .

It is a cyclic number.

It is not a de Polignac number, because 251350013 - 2⁴ = 251349997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (251350019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125675006 + 125675007.

It is an arithmetic number, because the mean of its divisors is an integer number (125675007).

Almost surely, 2^251350013 is an apocalyptic number.

It is an amenable number.

251350013 is a deficient number, since it is larger than the sum of its proper divisors (1).

251350013 is an equidigital number, since it uses as much as digits as its factorization.

251350013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 20.

The square root of 251350013 is about 15854.0219818190. The cubic root of 251350013 is about 631.0924298017.

The spelling of 251350013 in words is "two hundred fifty-one million, three hundred fifty thousand, thirteen".