313221971 has 4 divisors (see below), whose sum is σ = 313261200. Its totient is φ = 313182744.

The previous prime is 313221949. The next prime is 313222003. The reversal of 313221971 is 179122313.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 179122313 = 719 ⋅249127.

It is a cyclic number.

It is not a de Polignac number, because 313221971 - 2¹⁴ = 313205587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (313221371) 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, 2876 + ... + 25193.

It is an arithmetic number, because the mean of its divisors is an integer number (78315300).

Almost surely, 2^313221971 is an apocalyptic number.

313221971 is a deficient number, since it is larger than the sum of its proper divisors (39229).

313221971 is a wasteful number, since it uses less digits than its factorization.

313221971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39228.

The product of its digits is 2268, while the sum is 29.

The square root of 313221971 is about 17698.0781725022. The cubic root of 313221971 is about 679.1265970932.

The spelling of 313221971 in words is "three hundred thirteen million, two hundred twenty-one thousand, nine hundred seventy-one".