111144442 has 4 divisors (see below), whose sum is σ = 166716666. Its totient is φ = 55572220.

The previous prime is 111144413. The next prime is 111144457. The reversal of 111144442 is 244441111.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 108555561 + 2588881 = 10419^2 + 1609^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27786109 + ... + 27786112.

Almost surely, 2^111144442 is an apocalyptic number.

111144442 is a deficient number, since it is larger than the sum of its proper divisors (55572224).

111144442 is an equidigital number, since it uses as much as digits as its factorization.

111144442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55572223.

The product of its digits is 512, while the sum is 22.

The square root of 111144442 is about 10542.5064382243. The cubic root of 111144442 is about 480.7979234233.

Adding to 111144442 its reverse (244441111), we get a palindrome (355585553).

The spelling of 111144442 in words is "one hundred eleven million, one hundred forty-four thousand, four hundred forty-two".