31012113 has 16 divisors (see below), whose sum is σ = 46210752. Its totient is φ = 18336000.

The previous prime is 31012099. The next prime is 31012117. The reversal of 31012113 is 31121013.

It is not a de Polignac number, because 31012113 - 2¹⁰ = 31011089 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31012117) 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, 10108 + ... + 12813.

It is an arithmetic number, because the mean of its divisors is an integer number (2888172).

Almost surely, 2^31012113 is an apocalyptic number.

31012113 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31012113 is a deficient number, since it is larger than the sum of its proper divisors (15198639).

31012113 is a wasteful number, since it uses less digits than its factorization.

31012113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22976.

The product of its (nonzero) digits is 18, while the sum is 12.

The square root of 31012113 is about 5568.8520361022. The cubic root of 31012113 is about 314.1789755497.

Adding to 31012113 its reverse (31121013), we get a palindrome (62133126).

Subtracting 31012113 from its reverse (31121013), we obtain a square (108900 = 330²).

It can be divided in two parts, 31012 and 113, that added together give a triangular number (31125 = T₂₄₉).

The spelling of 31012113 in words is "thirty-one million, twelve thousand, one hundred thirteen".