515253342123 has 12 divisors (see below), whose sum is σ = 801505199040. Its totient is φ = 317078979696.

The previous prime is 515253342103. The next prime is 515253342137. The reversal of 515253342123 is 321243352515.

515253342123 is a `hidden beast` number, since 5 + 1 + 525 + 3 + 3 + 4 + 2 + 123 = 666.

It is not a de Polignac number, because 515253342123 - 2⁶ = 515253342059 is a prime.

It is a super-2 number, since 2×515253342123² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (515253342103) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2201937243 + ... + 2201937476.

It is an arithmetic number, because the mean of its divisors is an integer number (66792099920).

Almost surely, 2^515253342123 is an apocalyptic number.

515253342123 is a deficient number, since it is larger than the sum of its proper divisors (286251856917).

515253342123 is a wasteful number, since it uses less digits than its factorization.

515253342123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4403874738 (or 4403874735 counting only the distinct ones).

The product of its digits is 108000, while the sum is 36.

Adding to 515253342123 its reverse (321243352515), we get a palindrome (836496694638).

The spelling of 515253342123 in words is "five hundred fifteen billion, two hundred fifty-three million, three hundred forty-two thousand, one hundred twenty-three".