23313131331 has 16 divisors (see below), whose sum is σ = 35540473344. Its totient is φ = 13315901184.

The previous prime is 23313131323. The next prime is 23313131393. The reversal of 23313131331 is 13313131332.

It is not a de Polignac number, because 23313131331 - 2³ = 23313131323 is a prime.

It is a super-2 number, since 2×23313131331² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (23313132331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 196471 + ... + 291936.

It is an arithmetic number, because the mean of its divisors is an integer number (2221279584).

Almost surely, 2^23313131331 is an apocalyptic number.

23313131331 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

23313131331 is a deficient number, since it is larger than the sum of its proper divisors (12227342013).

23313131331 is a wasteful number, since it uses less digits than its factorization.

23313131331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 490690.

The product of its digits is 1458, while the sum is 24.

Adding to 23313131331 its reverse (13313131332), we get a palindrome (36626262663).

Subtracting from 23313131331 its reverse (13313131332), we obtain a palindrome (9999999999).

It can be divided in two parts, 233131 and 31331, that added together give a palindrome (264462).

The spelling of 23313131331 in words is "twenty-three billion, three hundred thirteen million, one hundred thirty-one thousand, three hundred thirty-one".