55218068 has 12 divisors (see below), whose sum is σ = 99748992. Its totient is φ = 26718360.

The previous prime is 55218061. The next prime is 55218071. The reversal of 55218068 is 86081255.

It is a happy number.

55218068 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55218061) 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, 222530 + ... + 222777.

It is an arithmetic number, because the mean of its divisors is an integer number (8312416).

Almost surely, 2^55218068 is an apocalyptic number.

It is an amenable number.

55218068 is a deficient number, since it is larger than the sum of its proper divisors (44530924).

55218068 is a wasteful number, since it uses less digits than its factorization.

55218068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445342 (or 445340 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 35.

The square root of 55218068 is about 7430.8860844451. The cubic root of 55218068 is about 380.7971906938.

The spelling of 55218068 in words is "fifty-five million, two hundred eighteen thousand, sixty-eight".