31310117 has 8 divisors (see below), whose sum is σ = 31671000. Its totient is φ = 30951424.

The previous prime is 31310089. The next prime is 31310137. The reversal of 31310117 is 71101313.

It can be written as a sum of positive squares in 4 ways, for example, as 11826721 + 19483396 = 3439^2 + 4414^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 31310117 - 2²⁰ = 30261541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31310095 and 31310104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31310137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61259 + ... + 61767.

It is an arithmetic number, because the mean of its divisors is an integer number (3958875).

Almost surely, 2^31310117 is an apocalyptic number.

It is an amenable number.

31310117 is a deficient number, since it is larger than the sum of its proper divisors (360883).

31310117 is a wasteful number, since it uses less digits than its factorization.

31310117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1095.

The product of its (nonzero) digits is 63, while the sum is 17.

The square root of 31310117 is about 5595.5443881717. The cubic root of 31310117 is about 315.1821135557.

The spelling of 31310117 in words is "thirty-one million, three hundred ten thousand, one hundred seventeen".