123243433412531 has 8 divisors (see below), whose sum is σ = 124517804457984. Its totient is φ = 121969140330240.

The previous prime is 123243433412509. The next prime is 123243433412569. The reversal of 123243433412531 is 135214334342321.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-123243433412531 is a prime.

It is a super-2 number, since 2×123243433412531² (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 (123243433412131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16310195 + ... + 22638668.

It is an arithmetic number, because the mean of its divisors is an integer number (15564725557248).

Almost surely, 2^{123243433412531} is an apocalyptic number.

123243433412531 is a deficient number, since it is larger than the sum of its proper divisors (1274371045453).

123243433412531 is an equidigital number, since it uses as much as digits as its factorization.

123243433412531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38981581.

The product of its digits is 622080, while the sum is 41.

Adding to 123243433412531 its reverse (135214334342321), we get a palindrome (258457767754852).

The spelling of 123243433412531 in words is "one hundred twenty-three trillion, two hundred forty-three billion, four hundred thirty-three million, four hundred twelve thousand, five hundred thirty-one".