216220123 has 8 divisors (see below), whose sum is σ = 247857920. Its totient is φ = 184769640.

The previous prime is 216220117. The next prime is 216220153. The reversal of 216220123 is 321022612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 216220123 - 2⁵ = 216220091 is a prime.

It is a super-2 number, since 2×216220123² = 93502283180270258, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216220123.

It is not an unprimeable number, because it can be changed into a prime (216220153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44343 + ... + 48976.

It is an arithmetic number, because the mean of its divisors is an integer number (30982240).

Almost surely, 2^216220123 is an apocalyptic number.

216220123 is a deficient number, since it is larger than the sum of its proper divisors (31637797).

216220123 is an equidigital number, since it uses as much as digits as its factorization.

216220123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93657.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 216220123 is about 14704.4252862871. The cubic root of 216220123 is about 600.2037483957.

Adding to 216220123 its reverse (321022612), we get a palindrome (537242735).

The spelling of 216220123 in words is "two hundred sixteen million, two hundred twenty thousand, one hundred twenty-three".