313171322621 has 4 divisors (see below), whose sum is σ = 318479311200. Its totient is φ = 307863334044.

The previous prime is 313171322609. The next prime is 313171322719. The reversal of 313171322621 is 126223171313.

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, and also an emirpimes, since its reverse is a distinct semiprime: 126223171313 = 32633 ⋅3867961.

It is a cyclic number.

It is not a de Polignac number, because 313171322621 - 2¹⁴ = 313171306237 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 (313171322521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2653994201 + ... + 2653994318.

It is an arithmetic number, because the mean of its divisors is an integer number (79619827800).

Almost surely, 2^313171322621 is an apocalyptic number.

It is an amenable number.

313171322621 is a deficient number, since it is larger than the sum of its proper divisors (5307988579).

313171322621 is an equidigital number, since it uses as much as digits as its factorization.

313171322621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5307988578.

The product of its digits is 9072, while the sum is 32.

Adding to 313171322621 its reverse (126223171313), we get a palindrome (439394493934).

The spelling of 313171322621 in words is "three hundred thirteen billion, one hundred seventy-one million, three hundred twenty-two thousand, six hundred twenty-one".