31118359 has 2 divisors, whose sum is σ = 31118360. Its totient is φ = 31118358.

The previous prime is 31118341. The next prime is 31118387. The reversal of 31118359 is 95381113.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31118359 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 31118359.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31118159) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15559179 + 15559180.

It is an arithmetic number, because the mean of its divisors is an integer number (15559180).

Almost surely, 2^31118359 is an apocalyptic number.

31118359 is a deficient number, since it is larger than the sum of its proper divisors (1).

31118359 is an equidigital number, since it uses as much as digits as its factorization.

31118359 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 31.

The square root of 31118359 is about 5578.3831887026. The cubic root of 31118359 is about 314.5373539260.

The spelling of 31118359 in words is "thirty-one million, one hundred eighteen thousand, three hundred fifty-nine".