313111213 has 4 divisors (see below), whose sum is σ = 326724768. Its totient is φ = 299497660.

The previous prime is 313111199. The next prime is 313111217. The reversal of 313111213 is 312111313.

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 313111213 - 2⁵ = 313111181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313111217) 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, 6806743 + ... + 6806788.

It is an arithmetic number, because the mean of its divisors is an integer number (81681192).

Almost surely, 2^313111213 is an apocalyptic number.

It is an amenable number.

313111213 is a deficient number, since it is larger than the sum of its proper divisors (13613555).

313111213 is a wasteful number, since it uses less digits than its factorization.

313111213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13613554.

The product of its digits is 54, while the sum is 16.

The square root of 313111213 is about 17694.9487990217. The cubic root of 313111213 is about 679.0465393085.

Adding to 313111213 its reverse (312111313), we get a palindrome (625222526).

The spelling of 313111213 in words is "three hundred thirteen million, one hundred eleven thousand, two hundred thirteen".