55185556 has 12 divisors (see below), whose sum is σ = 100773792. Its totient is φ = 26393048.

The previous prime is 55185551. The next prime is 55185563. The reversal of 55185556 is 65558155.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55185551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299830 + ... + 300013.

It is an arithmetic number, because the mean of its divisors is an integer number (8397816).

Almost surely, 2^55185556 is an apocalyptic number.

It is an amenable number.

55185556 is a deficient number, since it is larger than the sum of its proper divisors (45588236).

55185556 is a wasteful number, since it uses less digits than its factorization.

55185556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599870 (or 599868 counting only the distinct ones).

The product of its digits is 150000, while the sum is 40.

The square root of 55185556 is about 7428.6981362820. The cubic root of 55185556 is about 380.7224391414.

The spelling of 55185556 in words is "fifty-five million, one hundred eighty-five thousand, five hundred fifty-six".