123315331503550 has 24 divisors (see below), whose sum is σ = 241438438524600. Its totient is φ = 46730020358880.

The previous prime is 123315331503503. The next prime is 123315331503589. The reversal of 123315331503550 is 55305133513321.

It is a super-2 number, since 2×123315331503550² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 64902805105 + ... + 64902807004.

It is an arithmetic number, because the mean of its divisors is an integer number (10059934938525).

Almost surely, 2^{123315331503550} is an apocalyptic number.

123315331503550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123315331503550 is a deficient number, since it is larger than the sum of its proper divisors (118123107021050).

123315331503550 is a wasteful number, since it uses less digits than its factorization.

123315331503550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129805612140 (or 129805612135 counting only the distinct ones).

The product of its (nonzero) digits is 303750, while the sum is 40.

The spelling of 123315331503550 in words is "one hundred twenty-three trillion, three hundred fifteen billion, three hundred thirty-one million, five hundred three thousand, five hundred fifty".