216102091 has 2 divisors, whose sum is σ = 216102092. Its totient is φ = 216102090.

The previous prime is 216102083. The next prime is 216102097. The reversal of 216102091 is 190201612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216102091 - 2³ = 216102083 is a prime.

It is a super-2 number, since 2×216102091² = 93400227469144562, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216102097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108051045 + 108051046.

It is an arithmetic number, because the mean of its divisors is an integer number (108051046).

Almost surely, 2^216102091 is an apocalyptic number.

216102091 is a deficient number, since it is larger than the sum of its proper divisors (1).

216102091 is an equidigital number, since it uses as much as digits as its factorization.

216102091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 216102091 is about 14700.4112527507. The cubic root of 216102091 is about 600.0945138148.

The spelling of 216102091 in words is "two hundred sixteen million, one hundred two thousand, ninety-one".