2117407481831 has 2 divisors, whose sum is σ = 2117407481832. Its totient is φ = 2117407481830.

The previous prime is 2117407481809. The next prime is 2117407481857. The reversal of 2117407481831 is 1381847047112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2117407481831 - 2³⁰ = 2116333740007 is a prime.

It is a super-2 number, since 2×2117407481831² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117407481531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058703740915 + 1058703740916.

It is an arithmetic number, because the mean of its divisors is an integer number (1058703740916).

Almost surely, 2^{2117407481831} is an apocalyptic number.

2117407481831 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117407481831 is an equidigital number, since it uses as much as digits as its factorization.

2117407481831 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 301056, while the sum is 47.

The spelling of 2117407481831 in words is "two trillion, one hundred seventeen billion, four hundred seven million, four hundred eighty-one thousand, eight hundred thirty-one".