31320316 has 12 divisors (see below), whose sum is σ = 54901840. Its totient is φ = 15634080.

The previous prime is 31320281. The next prime is 31320337. The reversal of 31320316 is 61302313.

It is a super-3 number, since 3×31320316³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31320293 and 31320302.

It is a congruent number.

It is an unprimeable number.

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, 3681 + ... + 8728.

Almost surely, 2^31320316 is an apocalyptic number.

It is an amenable number.

31320316 is a deficient number, since it is larger than the sum of its proper divisors (23581524).

31320316 is a wasteful number, since it uses less digits than its factorization.

31320316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13044 (or 13042 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 31320316 is about 5596.4556640788. The cubic root of 31320316 is about 315.2163324570.

Adding to 31320316 its reverse (61302313), we get a palindrome (92622629).

The spelling of 31320316 in words is "thirty-one million, three hundred twenty thousand, three hundred sixteen".