55425218 has 8 divisors (see below), whose sum is σ = 83995212. Its totient is φ = 27426816.

The previous prime is 55425217. The next prime is 55425229. The reversal of 55425218 is 81252455.

55425218 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 48205249 + 7219969 = 6943^2 + 2687^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55425211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 142655 + ... + 143042.

Almost surely, 2^55425218 is an apocalyptic number.

55425218 is a deficient number, since it is larger than the sum of its proper divisors (28569994).

55425218 is a wasteful number, since it uses less digits than its factorization.

55425218 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 285796.

The product of its digits is 16000, while the sum is 32.

The square root of 55425218 is about 7444.8114818308. The cubic root of 55425218 is about 381.2727820123.

The spelling of 55425218 in words is "fifty-five million, four hundred twenty-five thousand, two hundred eighteen".