31090586090257 has 4 divisors (see below), whose sum is σ = 31375820825140. Its totient is φ = 30805351355376.

The previous prime is 31090586090209. The next prime is 31090586090261. The reversal of 31090586090257 is 75209068509013.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 19797551909136 + 11293034181121 = 4449444^2 + 3360511^2 .

It is a cyclic number.

It is not a de Polignac number, because 31090586090257 - 2¹⁹ = 31090585565969 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 31090586090198 and 31090586090207.

It is not an unprimeable number, because it can be changed into a prime (31090586090657) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142617367278 + ... + 142617367495.

It is an arithmetic number, because the mean of its divisors is an integer number (7843955206285).

Almost surely, 2^{31090586090257} is an apocalyptic number.

It is an amenable number.

31090586090257 is a deficient number, since it is larger than the sum of its proper divisors (285234734883).

31090586090257 is a wasteful number, since it uses less digits than its factorization.

31090586090257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285234734882.

The product of its (nonzero) digits is 4082400, while the sum is 55.

The spelling of 31090586090257 in words is "thirty-one trillion, ninety billion, five hundred eighty-six million, ninety thousand, two hundred fifty-seven".