111531423424 has 56 divisors (see below), whose sum is σ = 222933260000. Its totient is φ = 55359922176.

The previous prime is 111531423401. The next prime is 111531423533. The reversal of 111531423424 is 424324135111.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12545509 + ... + 12554395.

Almost surely, 2^111531423424 is an apocalyptic number.

It is an amenable number.

111531423424 is a deficient number, since it is larger than the sum of its proper divisors (111401836576).

111531423424 is a wasteful number, since it uses less digits than its factorization.

111531423424 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10305 (or 10295 counting only the distinct ones).

The product of its digits is 11520, while the sum is 31.

Adding to 111531423424 its reverse (424324135111), we get a palindrome (535855558535).

The spelling of 111531423424 in words is "one hundred eleven billion, five hundred thirty-one million, four hundred twenty-three thousand, four hundred twenty-four".