216407423 has 2 divisors, whose sum is σ = 216407424. Its totient is φ = 216407422.

The previous prime is 216407417. The next prime is 216407447. The reversal of 216407423 is 324704612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216407423 - 2⁴ = 216407407 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216407123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108203711 + 108203712.

It is an arithmetic number, because the mean of its divisors is an integer number (108203712).

Almost surely, 2^216407423 is an apocalyptic number.

216407423 is a deficient number, since it is larger than the sum of its proper divisors (1).

216407423 is an equidigital number, since it uses as much as digits as its factorization.

216407423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 216407423 is about 14710.7927386664. The cubic root of 216407423 is about 600.3770065790.

The spelling of 216407423 in words is "two hundred sixteen million, four hundred seven thousand, four hundred twenty-three".