111445445 has 4 divisors (see below), whose sum is σ = 133734540. Its totient is φ = 89156352.

The previous prime is 111445427. The next prime is 111445483. The reversal of 111445445 is 544544111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 30481441 + 80964004 = 5521^2 + 8998^2 .

It is a cyclic number.

It is not a de Polignac number, because 111445445 - 2¹⁴ = 111429061 is a prime.

It is a super-2 number, since 2×111445445² = 24840174422496050, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11144540 + ... + 11144549.

It is an arithmetic number, because the mean of its divisors is an integer number (33433635).

Almost surely, 2^111445445 is an apocalyptic number.

It is an amenable number.

111445445 is a deficient number, since it is larger than the sum of its proper divisors (22289095).

111445445 is an equidigital number, since it uses as much as digits as its factorization.

111445445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22289094.

The product of its digits is 6400, while the sum is 29.

The square root of 111445445 is about 10556.7724707886. The cubic root of 111445445 is about 481.2315668433.

Adding to 111445445 its reverse (544544111), we get a palindrome (655989556).

The spelling of 111445445 in words is "one hundred eleven million, four hundred forty-five thousand, four hundred forty-five".