31325113 has 16 divisors (see below), whose sum is σ = 33175296. Its totient is φ = 29549520.

The previous prime is 31325093. The next prime is 31325117. The reversal of 31325113 is 31152313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31325113 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31325117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 239058 + ... + 239188.

It is an arithmetic number, because the mean of its divisors is an integer number (2073456).

Almost surely, 2^31325113 is an apocalyptic number.

It is an amenable number.

31325113 is a deficient number, since it is larger than the sum of its proper divisors (1850183).

31325113 is a wasteful number, since it uses less digits than its factorization.

31325113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 324.

The product of its digits is 270, while the sum is 19.

The square root of 31325113 is about 5596.8842224938. The cubic root of 31325113 is about 315.2324244142.

Adding to 31325113 its reverse (31152313), we get a palindrome (62477426).

The spelling of 31325113 in words is "thirty-one million, three hundred twenty-five thousand, one hundred thirteen".