111311445 has 32 divisors (see below), whose sum is σ = 203943168. Its totient is φ = 50784768.

The previous prime is 111311419. The next prime is 111311449. The reversal of 111311445 is 544113111.

It is not a de Polignac number, because 111311445 - 2⁵ = 111311413 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111311449) 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, 89367 + ... + 90603.

It is an arithmetic number, because the mean of its divisors is an integer number (6373224).

Almost surely, 2^111311445 is an apocalyptic number.

111311445 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

111311445 is a deficient number, since it is larger than the sum of its proper divisors (92631723).

111311445 is a wasteful number, since it uses less digits than its factorization.

111311445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2109.

The product of its digits is 240, while the sum is 21.

The square root of 111311445 is about 10550.4239251321. The cubic root of 111311445 is about 481.0386147597.

Adding to 111311445 its reverse (544113111), we get a palindrome (655424556).

The spelling of 111311445 in words is "one hundred eleven million, three hundred eleven thousand, four hundred forty-five".