31710013 has 4 divisors (see below), whose sum is σ = 31771168. Its totient is φ = 31648860.

The previous prime is 31709987. The next prime is 31710023. The reversal of 31710013 is 31001713.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31710013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31710023) 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 3 ways as a sum of consecutive naturals, for example, 29793 + ... + 30838.

It is an arithmetic number, because the mean of its divisors is an integer number (7942792).

Almost surely, 2^31710013 is an apocalyptic number.

It is an amenable number.

31710013 is a deficient number, since it is larger than the sum of its proper divisors (61155).

31710013 is an equidigital number, since it uses as much as digits as its factorization.

31710013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61154.

The product of its (nonzero) digits is 63, while the sum is 16.

The square root of 31710013 is about 5631.1644444111. The cubic root of 31710013 is about 316.5182870255.

Adding to 31710013 its reverse (31001713), we get a palindrome (62711726).

The spelling of 31710013 in words is "thirty-one million, seven hundred ten thousand, thirteen".