2117755231 has 2 divisors, whose sum is σ = 2117755232. Its totient is φ = 2117755230.

The previous prime is 2117755147. The next prime is 2117755253. The reversal of 2117755231 is 1325577112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2117755231 - 2⁷ = 2117755103 is a prime.

It is a super-2 number, since 2×2117755231² = 8969774436855726722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2117755271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1058877615 + 1058877616.

It is an arithmetic number, because the mean of its divisors is an integer number (1058877616).

Almost surely, 2^2117755231 is an apocalyptic number.

2117755231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2117755231 is an equidigital number, since it uses as much as digits as its factorization.

2117755231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14700, while the sum is 34.

The square root of 2117755231 is about 46019.0746430217. The cubic root of 2117755231 is about 1284.1780854285.

The spelling of 2117755231 in words is "two billion, one hundred seventeen million, seven hundred fifty-five thousand, two hundred thirty-one".