123423822531 has 24 divisors (see below), whose sum is σ = 178938536400. Its totient is φ = 81978624000.

The previous prime is 123423822527. The next prime is 123423822541. The reversal of 123423822531 is 135228324321.

123423822531 is a `hidden beast` number, since 1 + 2 + 3 + 42 + 3 + 82 + 2 + 531 = 666.

It is not a de Polignac number, because 123423822531 - 2² = 123423822527 is a prime.

It is a super-2 number, since 2×123423822531² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123423822541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2770231 + ... + 2814431.

It is an arithmetic number, because the mean of its divisors is an integer number (7455772350).

Almost surely, 2^123423822531 is an apocalyptic number.

123423822531 is a deficient number, since it is larger than the sum of its proper divisors (55514713869).

123423822531 is a wasteful number, since it uses less digits than its factorization.

123423822531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45347 (or 45344 counting only the distinct ones).

The product of its digits is 69120, while the sum is 36.

The spelling of 123423822531 in words is "one hundred twenty-three billion, four hundred twenty-three million, eight hundred twenty-two thousand, five hundred thirty-one".