2118968231 has 2 divisors, whose sum is σ = 2118968232. Its totient is φ = 2118968230.

The previous prime is 2118968227. The next prime is 2118968239. The reversal of 2118968231 is 1328698112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2118968231 - 2² = 2118968227 is a prime.

It is a super-2 number, since 2×2118968231² = 8980052727974538722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2118968239) 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, 1059484115 + 1059484116.

It is an arithmetic number, because the mean of its divisors is an integer number (1059484116).

Almost surely, 2^2118968231 is an apocalyptic number.

2118968231 is a deficient number, since it is larger than the sum of its proper divisors (1).

2118968231 is an equidigital number, since it uses as much as digits as its factorization.

2118968231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 41.

The square root of 2118968231 is about 46032.2520739535. The cubic root of 2118968231 is about 1284.4232208881.

The spelling of 2118968231 in words is "two billion, one hundred eighteen million, nine hundred sixty-eight thousand, two hundred thirty-one".