313221213 has 12 divisors (see below), whose sum is σ = 476243040. Its totient is φ = 197823816.

The previous prime is 313221203. The next prime is 313221253. The reversal of 313221213 is 312122313.

It is not a de Polignac number, because 313221213 - 2¹⁶ = 313155677 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (313221203) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 915681 + ... + 916022.

It is an arithmetic number, because the mean of its divisors is an integer number (39686920).

Almost surely, 2^313221213 is an apocalyptic number.

It is an amenable number.

313221213 is a deficient number, since it is larger than the sum of its proper divisors (163021827).

313221213 is a wasteful number, since it uses less digits than its factorization.

313221213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1831728 (or 1831725 counting only the distinct ones).

The product of its digits is 216, while the sum is 18.

The square root of 313221213 is about 17698.0567577347. The cubic root of 313221213 is about 679.1260492619.

Adding to 313221213 its reverse (312122313), we get a palindrome (625343526).

The spelling of 313221213 in words is "three hundred thirteen million, two hundred twenty-one thousand, two hundred thirteen".