31113123 has 24 divisors (see below), whose sum is σ = 43614720. Its totient is φ = 19721520.

The previous prime is 31113113. The next prime is 31113167. The reversal of 31113123 is 32131113.

It is not a de Polignac number, because 31113123 - 2⁶ = 31113059 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31113113) 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 23 ways as a sum of consecutive naturals, for example, 393798 + ... + 393876.

It is an arithmetic number, because the mean of its divisors is an integer number (1817280).

Almost surely, 2^31113123 is an apocalyptic number.

31113123 is a deficient number, since it is larger than the sum of its proper divisors (12501597).

31113123 is an equidigital number, since it uses as much as digits as its factorization.

31113123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239 (or 196 counting only the distinct ones).

The product of its digits is 54, while the sum is 15.

The square root of 31113123 is about 5577.9138573485. The cubic root of 31113123 is about 314.5197115008.

Adding to 31113123 its reverse (32131113), we get a palindrome (63244236).

The spelling of 31113123 in words is "thirty-one million, one hundred thirteen thousand, one hundred twenty-three".