31011233223 has 16 divisors (see below), whose sum is σ = 41562958976. Its totient is φ = 20567092320.

The previous prime is 31011233221. The next prime is 31011233251. The reversal of 31011233223 is 32233211013.

It is not a de Polignac number, because 31011233223 - 2¹ = 31011233221 is a prime.

It is a super-2 number, since 2×31011233223² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 31011233223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31011233221) 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, 449493 + ... + 513873.

It is an arithmetic number, because the mean of its divisors is an integer number (2597684936).

Almost surely, 2^31011233223 is an apocalyptic number.

31011233223 is a deficient number, since it is larger than the sum of its proper divisors (10551725753).

31011233223 is a wasteful number, since it uses less digits than its factorization.

31011233223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65214.

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

Adding to 31011233223 its reverse (32233211013), we get a palindrome (63244444236).

The spelling of 31011233223 in words is "thirty-one billion, eleven million, two hundred thirty-three thousand, two hundred twenty-three".