216410123 has 4 divisors (see below), whose sum is σ = 217706160. Its totient is φ = 215114088.

The previous prime is 216410113. The next prime is 216410141. The reversal of 216410123 is 321014612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216410123 - 2¹² = 216406027 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216410095 and 216410104.

It is not an unprimeable number, because it can be changed into a prime (216410113) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 647768 + ... + 648101.

It is an arithmetic number, because the mean of its divisors is an integer number (54426540).

Almost surely, 2^216410123 is an apocalyptic number.

216410123 is a deficient number, since it is larger than the sum of its proper divisors (1296037).

216410123 is a wasteful number, since it uses less digits than its factorization.

216410123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1296036.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 216410123 is about 14710.8845077378. The cubic root of 216410123 is about 600.3795034298.

Adding to 216410123 its reverse (321014612), we get a palindrome (537424735).

The spelling of 216410123 in words is "two hundred sixteen million, four hundred ten thousand, one hundred twenty-three".