31841660117 has 4 divisors (see below), whose sum is σ = 31842333036. Its totient is φ = 31840987200.

The previous prime is 31841660107. The next prime is 31841660129. The reversal of 31841660117 is 71106614813.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71106614813 = 13 ⋅5469739601.

It can be written as a sum of positive squares in 2 ways, for example, as 22526707921 + 9314952196 = 150089^2 + 96514^2 .

It is a cyclic number.

It is not a de Polignac number, because 31841660117 - 2²⁶ = 31774551253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31841660107) 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, 259634 + ... + 362067.

It is an arithmetic number, because the mean of its divisors is an integer number (7960583259).

Almost surely, 2^31841660117 is an apocalyptic number.

It is an amenable number.

31841660117 is a deficient number, since it is larger than the sum of its proper divisors (672919).

31841660117 is an equidigital number, since it uses as much as digits as its factorization.

31841660117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672918.

The product of its (nonzero) digits is 24192, while the sum is 38.

The spelling of 31841660117 in words is "thirty-one billion, eight hundred forty-one million, six hundred sixty thousand, one hundred seventeen".