111555555 has 64 divisors (see below), whose sum is σ = 196992000. Its totient is φ = 53706240.

The previous prime is 111555541. The next prime is 111555583. The reversal of 111555555 is 555555111.

It is not a de Polignac number, because 111555555 - 2⁵ = 111555523 is a prime.

It is a nude number because it is divisible by every one of its digits.

111555555 is a modest number, since divided by 55555 gives 1115 as remainder.

It is a plaindrome in base 10.

It is a zygodrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 748621 + ... + 748769.

It is an arithmetic number, because the mean of its divisors is an integer number (3078000).

Almost surely, 2^111555555 is an apocalyptic number.

111555555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

111555555 is a deficient number, since it is larger than the sum of its proper divisors (85436445).

111555555 is a wasteful number, since it uses less digits than its factorization.

111555555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 284.

The product of its digits is 15625, while the sum is 33.

The square root of 111555555 is about 10561.9863188701. The cubic root of 111555555 is about 481.3900030068.

The spelling of 111555555 in words is "one hundred eleven million, five hundred fifty-five thousand, five hundred fifty-five".