55684218 has 8 divisors (see below), whose sum is σ = 111368448. Its totient is φ = 18561404.

The previous prime is 55684207. The next prime is 55684243. The reversal of 55684218 is 81248655.

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

55684218 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4640346 + ... + 4640357.

It is an arithmetic number, because the mean of its divisors is an integer number (13921056).

Almost surely, 2^55684218 is an apocalyptic number.

55684218 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55684218 is a wasteful number, since it uses less digits than its factorization.

55684218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9280708.

The product of its digits is 76800, while the sum is 39.

The square root of 55684218 is about 7462.1858727855. The cubic root of 55684218 is about 381.8657505463.

The spelling of 55684218 in words is "fifty-five million, six hundred eighty-four thousand, two hundred eighteen".