55055518 has 24 divisors (see below), whose sum is σ = 98118432. Its totient is φ = 23091264.

The previous prime is 55055479. The next prime is 55055569. The reversal of 55055518 is 81555055.

It is a happy number.

It is a super-2 number, since 2×55055518² = 6062220124496648, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 1371 + ... + 10582.

It is an arithmetic number, because the mean of its divisors is an integer number (4088268).

Almost surely, 2^55055518 is an apocalyptic number.

55055518 is a deficient number, since it is larger than the sum of its proper divisors (43062914).

55055518 is a wasteful number, since it uses less digits than its factorization.

55055518 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12016 (or 12009 counting only the distinct ones).

The product of its (nonzero) digits is 25000, while the sum is 34.

The square root of 55055518 is about 7419.9405657997. The cubic root of 55055518 is about 380.4231620242.

The spelling of 55055518 in words is "fifty-five million, fifty-five thousand, five hundred eighteen".