55217842 has 8 divisors (see below), whose sum is σ = 83354796. Its totient is φ = 27432912.

The previous prime is 55217837. The next prime is 55217867. The reversal of 55217842 is 24871255.

It is a happy number.

55217842 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 54154881 + 1062961 = 7359^2 + 1031^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 55217798 and 55217807.

It is an unprimeable number.

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, 87613 + ... + 88240.

Almost surely, 2^55217842 is an apocalyptic number.

55217842 is a deficient number, since it is larger than the sum of its proper divisors (28136954).

55217842 is a wasteful number, since it uses less digits than its factorization.

55217842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176012.

The product of its digits is 22400, while the sum is 34.

The square root of 55217842 is about 7430.8708776294. The cubic root of 55217842 is about 380.7966711761.

The spelling of 55217842 in words is "fifty-five million, two hundred seventeen thousand, eight hundred forty-two".