216422069 has 2 divisors, whose sum is σ = 216422070. Its totient is φ = 216422068.

The previous prime is 216422047. The next prime is 216422071. The reversal of 216422069 is 960224612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 117180625 + 99241444 = 10825^2 + 9962^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216422069 is a prime.

It is a super-2 number, since 2×216422069² = 93677023900481522, which contains 22 as substring.

Together with 216422071, 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 (216422009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108211034 + 108211035.

It is an arithmetic number, because the mean of its divisors is an integer number (108211035).

Almost surely, 2^216422069 is an apocalyptic number.

It is an amenable number.

216422069 is a deficient number, since it is larger than the sum of its proper divisors (1).

216422069 is an equidigital number, since it uses as much as digits as its factorization.

216422069 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 32.

The square root of 216422069 is about 14711.2905280264. The cubic root of 216422069 is about 600.3905503585.

The spelling of 216422069 in words is "two hundred sixteen million, four hundred twenty-two thousand, sixty-nine".