55500111 has 12 divisors (see below), whose sum is σ = 82333992. Its totient is φ = 35999856.

The previous prime is 55500089. The next prime is 55500139. The reversal of 55500111 is 11100555.

55500111 is a `hidden beast` number, since 5 + 550 + 0 + 111 = 666.

It is not a de Polignac number, because 55500111 - 2⁵ = 55500079 is a prime.

It is a zygodrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55500161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83001 + ... + 83666.

It is an arithmetic number, because the mean of its divisors is an integer number (6861166).

Almost surely, 2^55500111 is an apocalyptic number.

55500111 is a deficient number, since it is larger than the sum of its proper divisors (26833881).

55500111 is a wasteful number, since it uses less digits than its factorization.

55500111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166710 (or 166707 counting only the distinct ones).

The product of its (nonzero) digits is 125, while the sum is 18.

The square root of 55500111 is about 7449.8396627042. The cubic root of 55500111 is about 381.4444355886. Note that the first 4 decimals are identical.

Adding to 55500111 its reverse (11100555), we get a palindrome (66600666).

It can be divided in two parts, 55500 and 111, that added together give a triangular number (55611 = T₃₃₃).

The spelling of 55500111 in words is "fifty-five million, five hundred thousand, one hundred eleven".