55021418 has 8 divisors (see below), whose sum is σ = 87387012. Its totient is φ = 25892416.

The previous prime is 55021403. The next prime is 55021423. The reversal of 55021418 is 81412055.

It can be written as a sum of positive squares in 2 ways, for example, as 54715609 + 305809 = 7397^2 + 553^2 .

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

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, 809105 + ... + 809172.

Almost surely, 2^55021418 is an apocalyptic number.

55021418 is a deficient number, since it is larger than the sum of its proper divisors (32365594).

55021418 is a wasteful number, since it uses less digits than its factorization.

55021418 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1618296.

The product of its (nonzero) digits is 1600, while the sum is 26.

The square root of 55021418 is about 7417.6423478084. The cubic root of 55021418 is about 380.3446042975.

The spelling of 55021418 in words is "fifty-five million, twenty-one thousand, four hundred eighteen".