123515216 has 20 divisors (see below), whose sum is σ = 261066624. Its totient is φ = 56143200.

The previous prime is 123515207. The next prime is 123515233. The reversal of 123515216 is 612515321.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 350720 + ... + 351071.

Almost surely, 2^123515216 is an apocalyptic number.

123515216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123515216 is an abundant number, since it is smaller than the sum of its proper divisors (137551408).

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

123515216 is a wasteful number, since it uses less digits than its factorization.

123515216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 701810 (or 701804 counting only the distinct ones).

The product of its digits is 1800, while the sum is 26.

The square root of 123515216 is about 11113.7399645664. The cubic root of 123515216 is about 498.0123973409.

The spelling of 123515216 in words is "one hundred twenty-three million, five hundred fifteen thousand, two hundred sixteen".