31318345 has 8 divisors (see below), whose sum is σ = 37808064. Its totient is φ = 24903984.

The previous prime is 31318297. The next prime is 31318349. The reversal of 31318345 is 54381313.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31318345 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31318349) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 17919 + ... + 19588.

It is an arithmetic number, because the mean of its divisors is an integer number (4726008).

Almost surely, 2^31318345 is an apocalyptic number.

It is an amenable number.

31318345 is a deficient number, since it is larger than the sum of its proper divisors (6489719).

31318345 is a wasteful number, since it uses less digits than its factorization.

31318345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37679.

The product of its digits is 4320, while the sum is 28.

The square root of 31318345 is about 5596.2795677128. The cubic root of 31318345 is about 315.2097200883.

Adding to 31318345 its reverse (54381313), we get a palindrome (85699658).

It can be divided in two parts, 3131 and 8345, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 31318345 in words is "thirty-one million, three hundred eighteen thousand, three hundred forty-five".