123531512004513 has 24 divisors (see below), whose sum is σ = 179017334463968. Its totient is φ = 82085302660032.

The previous prime is 123531512004497. The next prime is 123531512004613. The reversal of 123531512004513 is 315400215135321.

It is a happy number.

123531512004513 is a `hidden beast` number, since 1 + 2 + 3 + 5 + 3 + 15 + 120 + 0 + 4 + 513 = 666.

It is not a de Polignac number, because 123531512004513 - 2⁴ = 123531512004497 is a prime.

It is a super-2 number, since 2×123531512004513² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (123531512004613) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 510417870 + ... + 510659832.

Almost surely, 2^{123531512004513} is an apocalyptic number.

It is an amenable number.

123531512004513 is a deficient number, since it is larger than the sum of its proper divisors (55485822459455).

123531512004513 is a wasteful number, since it uses less digits than its factorization.

123531512004513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 427053 (or 427050 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

Adding to 123531512004513 its reverse (315400215135321), we get a palindrome (438931727139834).

The spelling of 123531512004513 in words is "one hundred twenty-three trillion, five hundred thirty-one billion, five hundred twelve million, four thousand, five hundred thirteen".