31221323319 has 8 divisors (see below), whose sum is σ = 41858423152. Its totient is φ = 20699219520.

The previous prime is 31221323299. The next prime is 31221323323. The reversal of 31221323319 is 91332312213.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 31221323319 - 2¹² = 31221319223 is a prime.

It is a super-2 number, since 2×31221323319² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31221323519) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28748374 + ... + 28749459.

It is an arithmetic number, because the mean of its divisors is an integer number (5232302894).

Almost surely, 2^31221323319 is an apocalyptic number.

31221323319 is a deficient number, since it is larger than the sum of its proper divisors (10637099833).

31221323319 is a wasteful number, since it uses less digits than its factorization.

31221323319 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57498017.

The product of its digits is 5832, while the sum is 30.

The spelling of 31221323319 in words is "thirty-one billion, two hundred twenty-one million, three hundred twenty-three thousand, three hundred nineteen".