31331355321623 has 12 divisors (see below), whose sum is σ = 36452261287440. Its totient is φ = 26851333888512.

The previous prime is 31331355321619. The next prime is 31331355321647. The reversal of 31331355321623 is 32612355313313.

It is not a de Polignac number, because 31331355321623 - 2² = 31331355321619 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 (31331351321623) 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, 48647411 + ... + 49287252.

It is an arithmetic number, because the mean of its divisors is an integer number (3037688440620).

Almost surely, 2^{31331355321623} is an apocalyptic number.

31331355321623 is a deficient number, since it is larger than the sum of its proper divisors (5120905965817).

31331355321623 is an equidigital number, since it uses as much as digits as its factorization.

31331355321623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97941206 (or 97941199 counting only the distinct ones).

The product of its digits is 437400, while the sum is 41.

The spelling of 31331355321623 in words is "thirty-one trillion, three hundred thirty-one billion, three hundred fifty-five million, three hundred twenty-one thousand, six hundred twenty-three".