55018559 has 8 divisors (see below), whose sum is σ = 55891968. Its totient is φ = 54152280.

The previous prime is 55018549. The next prime is 55018573. The reversal of 55018559 is 95581055.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55018559 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55018549) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14984 + ... + 18290.

It is an arithmetic number, because the mean of its divisors is an integer number (6986496).

Almost surely, 2^55018559 is an apocalyptic number.

55018559 is a deficient number, since it is larger than the sum of its proper divisors (873409).

55018559 is a wasteful number, since it uses less digits than its factorization.

55018559 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3565.

The product of its (nonzero) digits is 45000, while the sum is 38.

The square root of 55018559 is about 7417.4496290841. The cubic root of 55018559 is about 380.3380164141.

The spelling of 55018559 in words is "fifty-five million, eighteen thousand, five hundred fifty-nine".