55618242 has 8 divisors (see below), whose sum is σ = 111236496. Its totient is φ = 18539412.

The previous prime is 55618229. The next prime is 55618243. The reversal of 55618242 is 24281655.

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

55618242 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (55618243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4634848 + ... + 4634859.

It is an arithmetic number, because the mean of its divisors is an integer number (13904562).

Almost surely, 2^55618242 is an apocalyptic number.

55618242 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.

55618242 is a wasteful number, since it uses less digits than its factorization.

55618242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9269712.

The product of its digits is 19200, while the sum is 33.

The square root of 55618242 is about 7457.7638739772. The cubic root of 55618242 is about 381.7148763707.

Adding to 55618242 its reverse (24281655), we get a palindrome (79899897).

The spelling of 55618242 in words is "fifty-five million, six hundred eighteen thousand, two hundred forty-two".