2091031317 has 12 divisors (see below), whose sum is σ = 3021119244. Its totient is φ = 1393679040.

The previous prime is 2091031309. The next prime is 2091031333. The reversal of 2091031317 is 7131301902.

It can be written as a sum of positive squares in 2 ways, for example, as 1842212241 + 248819076 = 42921^2 + 15774^2 .

It is not a de Polignac number, because 2091031317 - 2³ = 2091031309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2091031337) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 13513 + ... + 66065.

It is an arithmetic number, because the mean of its divisors is an integer number (251759937).

Almost surely, 2^2091031317 is an apocalyptic number.

It is an amenable number.

2091031317 is a deficient number, since it is larger than the sum of its proper divisors (930087927).

2091031317 is a wasteful number, since it uses less digits than its factorization.

2091031317 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56980 (or 56977 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 2091031317 is about 45727.7958904647. The cubic root of 2091031317 is about 1278.7535304323.

The spelling of 2091031317 in words is "two billion, ninety-one million, thirty-one thousand, three hundred seventeen".