123216315 has 16 divisors (see below), whose sum is σ = 197775648. Its totient is φ = 65505536.

The previous prime is 123216307. The next prime is 123216319. The reversal of 123216315 is 513612321.

It is a cyclic number.

It is not a de Polignac number, because 123216315 - 2³ = 123216307 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123216319) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8202 + ... + 17711.

It is an arithmetic number, because the mean of its divisors is an integer number (12360978).

Almost surely, 2^123216315 is an apocalyptic number.

123216315 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

123216315 is a deficient number, since it is larger than the sum of its proper divisors (74559333).

123216315 is a wasteful number, since it uses less digits than its factorization.

123216315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26238.

The product of its digits is 1080, while the sum is 24.

The square root of 123216315 is about 11100.2844558146. The cubic root of 123216315 is about 497.6103506801.

Adding to 123216315 its reverse (513612321), we get a palindrome (636828636).

The spelling of 123216315 in words is "one hundred twenty-three million, two hundred sixteen thousand, three hundred fifteen".