216610123 has 2 divisors, whose sum is σ = 216610124. Its totient is φ = 216610122.

The previous prime is 216610111. The next prime is 216610153. The reversal of 216610123 is 321016612.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 216610123 - 2⁹ = 216609611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 216610094 and 216610103.

It is not a weakly prime, because it can be changed into another prime (216610103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108305061 + 108305062.

It is an arithmetic number, because the mean of its divisors is an integer number (108305062).

Almost surely, 2^216610123 is an apocalyptic number.

216610123 is a deficient number, since it is larger than the sum of its proper divisors (1).

216610123 is an equidigital number, since it uses as much as digits as its factorization.

216610123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 22.

The square root of 216610123 is about 14717.6806256964. The cubic root of 216610123 is about 600.5643976294.

Adding to 216610123 its reverse (321016612), we get a palindrome (537626735).

The spelling of 216610123 in words is "two hundred sixteen million, six hundred ten thousand, one hundred twenty-three".