251025313 has 16 divisors (see below), whose sum is σ = 313353216. Its totient is φ = 195362640.

The previous prime is 251025293. The next prime is 251025323. The reversal of 251025313 is 313520152.

It is a de Polignac number, because none of the positive numbers 2^k-251025313 is a prime.

It is not an unprimeable number, because it can be changed into a prime (251025323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 85020 + ... + 87922.

It is an arithmetic number, because the mean of its divisors is an integer number (19584576).

Almost surely, 2^251025313 is an apocalyptic number.

It is an amenable number.

251025313 is a deficient number, since it is larger than the sum of its proper divisors (62327903).

251025313 is a wasteful number, since it uses less digits than its factorization.

251025313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4044.

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

The square root of 251025313 is about 15843.7783688109. The cubic root of 251025313 is about 630.8205592320.

Adding to 251025313 its reverse (313520152), we get a palindrome (564545465).

The spelling of 251025313 in words is "two hundred fifty-one million, twenty-five thousand, three hundred thirteen".