31606113 has 32 divisors (see below), whose sum is σ = 53425152. Its totient is φ = 16142400.

The previous prime is 31606097. The next prime is 31606181. The reversal of 31606113 is 31160613.

It is not a de Polignac number, because 31606113 - 2⁴ = 31606097 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 31606113.

It is not an unprimeable number, because it can be changed into a prime (31606313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12970 + ... + 15212.

It is an arithmetic number, because the mean of its divisors is an integer number (1669536).

Almost surely, 2^31606113 is an apocalyptic number.

31606113 is a gapful number since it is divisible by the number (33) formed by its first and last digit.

It is an amenable number.

31606113 is a deficient number, since it is larger than the sum of its proper divisors (21819039).

31606113 is a wasteful number, since it uses less digits than its factorization.

31606113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2325.

The product of its (nonzero) digits is 324, while the sum is 21.

The square root of 31606113 is about 5621.9314296779. The cubic root of 31606113 is about 316.1722109185.

Adding to 31606113 its reverse (31160613), we get a palindrome (62766726).

The spelling of 31606113 in words is "thirty-one million, six hundred six thousand, one hundred thirteen".