111564243 has 32 divisors (see below), whose sum is σ = 189662720. Its totient is φ = 63491040.

The previous prime is 111564223. The next prime is 111564281. The reversal of 111564243 is 342465111.

It is a happy number.

111564243 is a `hidden beast` number, since 1 + 1 + 15 + 642 + 4 + 3 = 666.

It is not a de Polignac number, because 111564243 - 2¹² = 111560147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111564223) 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, 51288 + ... + 53418.

It is an arithmetic number, because the mean of its divisors is an integer number (5926960).

Almost surely, 2^111564243 is an apocalyptic number.

111564243 is a deficient number, since it is larger than the sum of its proper divisors (78098477).

111564243 is a wasteful number, since it uses less digits than its factorization.

111564243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2424 (or 2418 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 111564243 is about 10562.3975971367. The cubic root of 111564243 is about 481.4024996437.

The spelling of 111564243 in words is "one hundred eleven million, five hundred sixty-four thousand, two hundred forty-three".