55218334 has 16 divisors (see below), whose sum is σ = 83825280. Its totient is φ = 27278680.

The previous prime is 55218307. The next prime is 55218337. The reversal of 55218334 is 43381255.

It is a junction number, because it is equal to n+sod(n) for n = 55218296 and 55218305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55218337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 109527 + ... + 110029.

It is an arithmetic number, because the mean of its divisors is an integer number (5239080).

Almost surely, 2^55218334 is an apocalyptic number.

55218334 is a deficient number, since it is larger than the sum of its proper divisors (28606946).

55218334 is a wasteful number, since it uses less digits than its factorization.

55218334 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055.

The product of its digits is 14400, while the sum is 31.

The square root of 55218334 is about 7430.9039826928. The cubic root of 55218334 is about 380.7978021597.

Adding to 55218334 its reverse (43381255), we get a palindrome (98599589).

The spelling of 55218334 in words is "fifty-five million, two hundred eighteen thousand, three hundred thirty-four".