216183899 has 2 divisors, whose sum is σ = 216183900. Its totient is φ = 216183898.

The previous prime is 216183871. The next prime is 216183911. The reversal of 216183899 is 998381612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216183899 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216183829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108091949 + 108091950.

It is an arithmetic number, because the mean of its divisors is an integer number (108091950).

Almost surely, 2^216183899 is an apocalyptic number.

216183899 is a deficient number, since it is larger than the sum of its proper divisors (1).

216183899 is an equidigital number, since it uses as much as digits as its factorization.

216183899 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 47.

The square root of 216183899 is about 14703.1934966524. The cubic root of 216183899 is about 600.1702285510.

The spelling of 216183899 in words is "two hundred sixteen million, one hundred eighty-three thousand, eight hundred ninety-nine".