123513044043431 has 32 divisors (see below), whose sum is σ = 142876567680000. Its totient is φ = 104585457180672.

The previous prime is 123513044043421. The next prime is 123513044043437. The reversal of 123513044043431 is 134340440315321.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123513044043431 is a prime.

It is a super-2 number, since 2×123513044043431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123513044043437) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 351285740 + ... + 351637166.

It is an arithmetic number, because the mean of its divisors is an integer number (4464892740000).

Almost surely, 2^{123513044043431} is an apocalyptic number.

123513044043431 is a deficient number, since it is larger than the sum of its proper divisors (19363523636569).

123513044043431 is a wasteful number, since it uses less digits than its factorization.

123513044043431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352911.

The product of its (nonzero) digits is 207360, while the sum is 38.

Adding to 123513044043431 its reverse (134340440315321), we get a palindrome (257853484358752).

The spelling of 123513044043431 in words is "one hundred twenty-three trillion, five hundred thirteen billion, forty-four million, forty-three thousand, four hundred thirty-one".