55071218 has 8 divisors (see below), whose sum is σ = 84528048. Its totient is φ = 26895204.

The previous prime is 55071209. The next prime is 55071229. The reversal of 55071218 is 81217055.

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

It is a Curzon 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, 320096 + ... + 320267.

It is an arithmetic number, because the mean of its divisors is an integer number (10566006).

Almost surely, 2^55071218 is an apocalyptic number.

55071218 is a deficient number, since it is larger than the sum of its proper divisors (29456830).

55071218 is a wasteful number, since it uses less digits than its factorization.

55071218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 640408.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 55071218 is about 7420.9984503435. The cubic root of 55071218 is about 380.4593199257.

The spelling of 55071218 in words is "fifty-five million, seventy-one thousand, two hundred eighteen".