31530117 has 8 divisors (see below), whose sum is σ = 42096096. Its totient is φ = 20992112.

The previous prime is 31530097. The next prime is 31530143. The reversal of 31530117 is 71103513.

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 31530117 - 2¹¹ = 31528069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31530093 and 31530102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31530197) 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 7 ways as a sum of consecutive naturals, for example, 4203 + ... + 8984.

It is an arithmetic number, because the mean of its divisors is an integer number (5262012).

Almost surely, 2^31530117 is an apocalyptic number.

It is an amenable number.

31530117 is a deficient number, since it is larger than the sum of its proper divisors (10565979).

31530117 is a wasteful number, since it uses less digits than its factorization.

31530117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13987.

The product of its (nonzero) digits is 315, while the sum is 21.

The square root of 31530117 is about 5615.1684747655. The cubic root of 31530117 is about 315.9185985115.

The spelling of 31530117 in words is "thirty-one million, five hundred thirty thousand, one hundred seventeen".