31213300223 has 6 divisors (see below), whose sum is σ = 36309349296. Its totient is φ = 26754257292.

The previous prime is 31213300189. The next prime is 31213300289. The reversal of 31213300223 is 32200331213.

It is not a de Polignac number, because 31213300223 - 2⁸ = 31213299967 is a prime.

It is a super-2 number, since 2×31213300223² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31213300195 and 31213300204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31213302223) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 318503015 + ... + 318503112.

It is an arithmetic number, because the mean of its divisors is an integer number (6051558216).

Almost surely, 2^31213300223 is an apocalyptic number.

31213300223 is a deficient number, since it is larger than the sum of its proper divisors (5096049073).

31213300223 is an equidigital number, since it uses as much as digits as its factorization.

31213300223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 637006141 (or 637006134 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 31213300223 its reverse (32200331213), we get a palindrome (63413631436).

The spelling of 31213300223 in words is "thirty-one billion, two hundred thirteen million, three hundred thousand, two hundred twenty-three".