216662023 has 2 divisors, whose sum is σ = 216662024. Its totient is φ = 216662022.

The previous prime is 216662009. The next prime is 216662071. The reversal of 216662023 is 320266612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216662023 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216661982 and 216662000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216662123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108331011 + 108331012.

It is an arithmetic number, because the mean of its divisors is an integer number (108331012).

Almost surely, 2^216662023 is an apocalyptic number.

216662023 is a deficient number, since it is larger than the sum of its proper divisors (1).

216662023 is an equidigital number, since it uses as much as digits as its factorization.

216662023 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5184, while the sum is 28.

The square root of 216662023 is about 14719.4437055209. The cubic root of 216662023 is about 600.6123590739.

The spelling of 216662023 in words is "two hundred sixteen million, six hundred sixty-two thousand, twenty-three".