111223557 has 16 divisors (see below), whose sum is σ = 167479360. Its totient is φ = 72932400.

The previous prime is 111223543. The next prime is 111223577. The reversal of 111223557 is 755322111.

It is not a de Polignac number, because 111223557 - 2¹⁰ = 111222533 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 a plaindrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 111223557.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111223577) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32119 + ... + 35412.

It is an arithmetic number, because the mean of its divisors is an integer number (10467460).

Almost surely, 2^111223557 is an apocalyptic number.

It is an amenable number.

111223557 is a deficient number, since it is larger than the sum of its proper divisors (56255803).

111223557 is an equidigital number, since it uses as much as digits as its factorization.

111223557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67601 (or 67595 counting only the distinct ones).

The product of its digits is 2100, while the sum is 27.

The square root of 111223557 is about 10546.2579619503. The cubic root of 111223557 is about 480.9119771271.

Adding to 111223557 its reverse (755322111), we get a palindrome (866545668).

The spelling of 111223557 in words is "one hundred eleven million, two hundred twenty-three thousand, five hundred fifty-seven".