216242599 has 2 divisors, whose sum is σ = 216242600. Its totient is φ = 216242598.

The previous prime is 216242503. The next prime is 216242603. The reversal of 216242599 is 995242612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216242599 - 2⁹ = 216242087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216242099) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108121299 + 108121300.

It is an arithmetic number, because the mean of its divisors is an integer number (108121300).

Almost surely, 2^216242599 is an apocalyptic number.

216242599 is a deficient number, since it is larger than the sum of its proper divisors (1).

216242599 is an equidigital number, since it uses as much as digits as its factorization.

216242599 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 216242599 is about 14705.1895261503. The cubic root of 216242599 is about 600.2245446594.

The spelling of 216242599 in words is "two hundred sixteen million, two hundred forty-two thousand, five hundred ninety-nine".