31315113 has 16 divisors (see below), whose sum is σ = 47381760. Its totient is φ = 20431728.

The previous prime is 31315111. The next prime is 31315117. The reversal of 31315113 is 31151313.

It is not a de Polignac number, because 31315113 - 2¹ = 31315111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (31315111) 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, 11070 + ... + 13607.

It is an arithmetic number, because the mean of its divisors is an integer number (2961360).

Almost surely, 2^31315113 is an apocalyptic number.

It is an amenable number.

31315113 is a deficient number, since it is larger than the sum of its proper divisors (16066647).

31315113 is a wasteful number, since it uses less digits than its factorization.

31315113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24733 (or 24727 counting only the distinct ones).

The product of its digits is 135, while the sum is 18.

The square root of 31315113 is about 5595.9907969903. The cubic root of 31315113 is about 315.1988766795.

Adding to 31315113 its reverse (31151313), we get a palindrome (62466426).

The spelling of 31315113 in words is "thirty-one million, three hundred fifteen thousand, one hundred thirteen".