216922319 has 2 divisors, whose sum is σ = 216922320. Its totient is φ = 216922318.

The previous prime is 216922247. The next prime is 216922331. The reversal of 216922319 is 913229612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216922319 is a prime.

It is a super-2 number, since 2×216922319² = 94110584960675522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216922339) 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, 108461159 + 108461160.

It is an arithmetic number, because the mean of its divisors is an integer number (108461160).

Almost surely, 2^216922319 is an apocalyptic number.

216922319 is a deficient number, since it is larger than the sum of its proper divisors (1).

216922319 is an equidigital number, since it uses as much as digits as its factorization.

216922319 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11664, while the sum is 35.

The square root of 216922319 is about 14728.2829617033. The cubic root of 216922319 is about 600.8527864254.

The spelling of 216922319 in words is "two hundred sixteen million, nine hundred twenty-two thousand, three hundred nineteen".