251130313 has 4 divisors (see below), whose sum is σ = 287006080. Its totient is φ = 215254548.

The previous prime is 251130311. The next prime is 251130317. The reversal of 251130313 is 313031152.

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 251130313 - 2¹ = 251130311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (251130311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 17937873 + ... + 17937886.

It is an arithmetic number, because the mean of its divisors is an integer number (71751520).

Almost surely, 2^251130313 is an apocalyptic number.

It is an amenable number.

251130313 is a deficient number, since it is larger than the sum of its proper divisors (35875767).

251130313 is an equidigital number, since it uses as much as digits as its factorization.

251130313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35875766.

The product of its (nonzero) digits is 270, while the sum is 19.

The square root of 251130313 is about 15847.0916259104. The cubic root of 251130313 is about 630.9085011277.

Adding to 251130313 its reverse (313031152), we get a palindrome (564161465).

The spelling of 251130313 in words is "two hundred fifty-one million, one hundred thirty thousand, three hundred thirteen".