31085459 has 2 divisors, whose sum is σ = 31085460. Its totient is φ = 31085458.

The previous prime is 31085413. The next prime is 31085479. The reversal of 31085459 is 95458013.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31085459 - 2¹² = 31081363 is a prime.

It is a super-2 number, since 2×31085459² = 1932611522481362, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (31085479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15542729 + 15542730.

It is an arithmetic number, because the mean of its divisors is an integer number (15542730).

Almost surely, 2^31085459 is an apocalyptic number.

31085459 is a deficient number, since it is larger than the sum of its proper divisors (1).

31085459 is an equidigital number, since it uses as much as digits as its factorization.

31085459 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 35.

The square root of 31085459 is about 5575.4335257449. The cubic root of 31085459 is about 314.4264662449.

The spelling of 31085459 in words is "thirty-one million, eighty-five thousand, four hundred fifty-nine".