55556318 has 4 divisors (see below), whose sum is σ = 83334480. Its totient is φ = 27778158.

The previous prime is 55556317. The next prime is 55556341. The reversal of 55556318 is 81365555.

It is a semiprime because it is the product of two primes.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55556311) 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 as a sum of consecutive naturals, namely, 13889078 + ... + 13889081.

It is an arithmetic number, because the mean of its divisors is an integer number (20833620).

Almost surely, 2^55556318 is an apocalyptic number.

55556318 is a deficient number, since it is larger than the sum of its proper divisors (27778162).

55556318 is a wasteful number, since it uses less digits than its factorization.

55556318 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27778161.

The product of its digits is 90000, while the sum is 38.

The square root of 55556318 is about 7453.6110711520. The cubic root of 55556318 is about 381.5731597385.

The spelling of 55556318 in words is "fifty-five million, five hundred fifty-six thousand, three hundred eighteen".