31085359 has 2 divisors, whose sum is σ = 31085360. Its totient is φ = 31085358.

The previous prime is 31085323. The next prime is 31085363. The reversal of 31085359 is 95358013.

It is a strong prime.

It is an emirp because it is prime and its reverse (95358013) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31085359 - 2²¹ = 28988207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31085459) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15542679 + 15542680.

It is an arithmetic number, because the mean of its divisors is an integer number (15542680).

Almost surely, 2^31085359 is an apocalyptic number.

31085359 is a deficient number, since it is larger than the sum of its proper divisors (1).

31085359 is an equidigital number, since it uses as much as digits as its factorization.

31085359 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16200, while the sum is 34.

The square root of 31085359 is about 5575.4245578252. The cubic root of 31085359 is about 314.4261290810.

The spelling of 31085359 in words is "thirty-one million, eighty-five thousand, three hundred fifty-nine".