2212687991 has 2 divisors, whose sum is σ = 2212687992. Its totient is φ = 2212687990.

The previous prime is 2212687963. The next prime is 2212687993. The reversal of 2212687991 is 1997862122.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2212687991 - 2³⁰ = 1138946167 is a prime.

Together with 2212687993, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2212687993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106343995 + 1106343996.

It is an arithmetic number, because the mean of its divisors is an integer number (1106343996).

Almost surely, 2^2212687991 is an apocalyptic number.

2212687991 is a deficient number, since it is larger than the sum of its proper divisors (1).

2212687991 is an equidigital number, since it uses as much as digits as its factorization.

2212687991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 217728, while the sum is 47.

The square root of 2212687991 is about 47039.2175849046. The cubic root of 2212687991 is about 1303.0869423379.

The spelling of 2212687991 in words is "two billion, two hundred twelve million, six hundred eighty-seven thousand, nine hundred ninety-one".