111818138 has 8 divisors (see below), whose sum is σ = 168058260. Its totient is φ = 55798720.

The previous prime is 111818137. The next prime is 111818141. The reversal of 111818138 is 831818111.

It can be written as a sum of positive squares in 2 ways, for example, as 91450969 + 20367169 = 9563^2 + 4513^2 .

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

It is not an unprimeable number, because it can be changed into a prime (111818131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53903 + ... + 55938.

Almost surely, 2^111818138 is an apocalyptic number.

111818138 is a deficient number, since it is larger than the sum of its proper divisors (56240122).

111818138 is a wasteful number, since it uses less digits than its factorization.

111818138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110352.

The product of its digits is 1536, while the sum is 32.

The square root of 111818138 is about 10574.4095816268. The cubic root of 111818138 is about 481.7674107241.

The spelling of 111818138 in words is "one hundred eleven million, eight hundred eighteen thousand, one hundred thirty-eight".