31211323023 has 16 divisors (see below), whose sum is σ = 42126049280. Its totient is φ = 20553505056.

The previous prime is 31211323019. The next prime is 31211323057. The reversal of 31211323023 is 32032311213.

It is not a de Polignac number, because 31211323023 - 2² = 31211323019 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 (31211323823) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91615 + ... + 266112.

It is an arithmetic number, because the mean of its divisors is an integer number (2632878080).

Almost surely, 2^31211323023 is an apocalyptic number.

31211323023 is a deficient number, since it is larger than the sum of its proper divisors (10914726257).

31211323023 is a wasteful number, since it uses less digits than its factorization.

31211323023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358086.

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 31211323023 its reverse (32032311213), we get a palindrome (63243634236).

The spelling of 31211323023 in words is "thirty-one billion, two hundred eleven million, three hundred twenty-three thousand, twenty-three".