313125251 has 4 divisors (see below), whose sum is σ = 317414712. Its totient is φ = 308835792.

The previous prime is 313125223. The next prime is 313125271. The reversal of 313125251 is 152521313.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 313125251 - 2²⁶ = 246016387 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313125221) 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, 2144621 + ... + 2144766.

It is an arithmetic number, because the mean of its divisors is an integer number (79353678).

Almost surely, 2^313125251 is an apocalyptic number.

313125251 is a deficient number, since it is larger than the sum of its proper divisors (4289461).

313125251 is an equidigital number, since it uses as much as digits as its factorization.

313125251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4289460.

The product of its digits is 900, while the sum is 23.

The square root of 313125251 is about 17695.3454614483. The cubic root of 313125251 is about 679.0566872607.

Adding to 313125251 its reverse (152521313), we get a palindrome (465646564).

It can be divided in two parts, 31312 and 5251, that added together give a palindrome (36563).

The spelling of 313125251 in words is "three hundred thirteen million, one hundred twenty-five thousand, two hundred fifty-one".