216302123 has 2 divisors, whose sum is σ = 216302124. Its totient is φ = 216302122.

The previous prime is 216302089. The next prime is 216302161. The reversal of 216302123 is 321203612.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216302123 - 2²⁶ = 149193259 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 216302095 and 216302104.

It is not a weakly prime, because it can be changed into another prime (216302323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108151061 + 108151062.

It is an arithmetic number, because the mean of its divisors is an integer number (108151062).

Almost surely, 2^216302123 is an apocalyptic number.

216302123 is a deficient number, since it is larger than the sum of its proper divisors (1).

216302123 is an equidigital number, since it uses as much as digits as its factorization.

216302123 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 216302123 is about 14707.2132982425. The cubic root of 216302123 is about 600.2796131924.

Adding to 216302123 its reverse (321203612), we get a palindrome (537505735).

The spelling of 216302123 in words is "two hundred sixteen million, three hundred two thousand, one hundred twenty-three".