31321122319 has 4 divisors (see below), whose sum is σ = 31452173280. Its totient is φ = 31190071360.

The previous prime is 31321122311. The next prime is 31321122359. The reversal of 31321122319 is 91322112313.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 31321122319 - 2³ = 31321122311 is a prime.

It is a super-2 number, since 2×31321122319² (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 (31321122311) 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, 65525122 + ... + 65525599.

It is an arithmetic number, because the mean of its divisors is an integer number (7863043320).

Almost surely, 2^31321122319 is an apocalyptic number.

31321122319 is a deficient number, since it is larger than the sum of its proper divisors (131050961).

31321122319 is a wasteful number, since it uses less digits than its factorization.

31321122319 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131050960.

The product of its digits is 1944, while the sum is 28.

The spelling of 31321122319 in words is "thirty-one billion, three hundred twenty-one million, one hundred twenty-two thousand, three hundred nineteen".