123815216 has 40 divisors (see below), whose sum is σ = 290293920. Its totient is φ = 49941504.

The previous prime is 123815201. The next prime is 123815231. The reversal of 123815216 is 612518321.

It is an interprime number because it is at equal distance from previous prime (123815201) and next prime (123815231).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30611 + ... + 34418.

It is an arithmetic number, because the mean of its divisors is an integer number (7257348).

Almost surely, 2^123815216 is an apocalyptic number.

123815216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123815216 is an abundant number, since it is smaller than the sum of its proper divisors (166478704).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123815216 is a wasteful number, since it uses less digits than its factorization.

123815216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65061 (or 65055 counting only the distinct ones).

The product of its digits is 2880, while the sum is 29.

The square root of 123815216 is about 11127.2285857710. The cubic root of 123815216 is about 498.4152705717.

The spelling of 123815216 in words is "one hundred twenty-three million, eight hundred fifteen thousand, two hundred sixteen".