111555423 has 24 divisors (see below), whose sum is σ = 185494400. Its totient is φ = 63282384.

The previous prime is 111555349. The next prime is 111555443. The reversal of 111555423 is 324555111.

111555423 is a `hidden beast` number, since 1 + 115 + 5 + 542 + 3 = 666.

It is not a de Polignac number, because 111555423 - 2⁸ = 111555167 is a prime.

It is a super-2 number, since 2×111555423² = 24889224801417858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111555443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2388 + ... + 15126.

Almost surely, 2^111555423 is an apocalyptic number.

111555423 is a deficient number, since it is larger than the sum of its proper divisors (73938977).

111555423 is a wasteful number, since it uses less digits than its factorization.

111555423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12891 (or 12888 counting only the distinct ones).

The product of its digits is 3000, while the sum is 27.

The square root of 111555423 is about 10561.9800700437. The cubic root of 111555423 is about 481.3898131358.

The spelling of 111555423 in words is "one hundred eleven million, five hundred fifty-five thousand, four hundred twenty-three".