55218484 has 12 divisors (see below), whose sum is σ = 101718400. Its totient is φ = 26156088.

The previous prime is 55218463. The next prime is 55218491. The reversal of 55218484 is 48481255.

It is a congruent number.

It is an unprimeable number.

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, 363204 + ... + 363355.

Almost surely, 2^55218484 is an apocalyptic number.

It is an amenable number.

55218484 is a deficient number, since it is larger than the sum of its proper divisors (46499916).

55218484 is a wasteful number, since it uses less digits than its factorization.

55218484 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726582 (or 726580 counting only the distinct ones).

The product of its digits is 51200, while the sum is 37.

The square root of 55218484 is about 7430.9140756706. The cubic root of 55218484 is about 380.7981469704.

The spelling of 55218484 in words is "fifty-five million, two hundred eighteen thousand, four hundred eighty-four".