5556111 has 16 divisors (see below), whose sum is σ = 8166528. Its totient is φ = 3332000.

The previous prime is 5556107. The next prime is 5556121. The reversal of 5556111 is 1116555.

5556111 is a nontrivial binomial coefficient, being equal to C(3334, 2).

It is a 5-Lehmer number, since φ(5556111) divides (5556111-1)⁵.

It is a cyclic number.

It is not a de Polignac number, because 5556111 - 2² = 5556107 is a prime.

5556111 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5556121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2500 + ... + 4166.

It is an arithmetic number, because the mean of its divisors is an integer number (510408).

Almost surely, 2^5556111 is an apocalyptic number.

5556111 is the 3333-rd triangular number and also the 1667-th hexagonal number.

5556111 is a deficient number, since it is larger than the sum of its proper divisors (2610417).

5556111 is a wasteful number, since it uses less digits than its factorization.

5556111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1782.

The product of its digits is 750, while the sum is 24.

The square root of 5556111 is about 2357.1404285702. The cubic root of 5556111 is about 177.1156638117.

It can be divided in two parts, 555 and 6111, that added together give a palindrome (6666).

The spelling of 5556111 in words is "five million, five hundred fifty-six thousand, one hundred eleven".