55199018 has 16 divisors (see below), whose sum is σ = 95107200. Its totient is φ = 23536656.

The previous prime is 55198999. The next prime is 55199029. The reversal of 55199018 is 81099155.

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 7 ways as a sum of consecutive naturals, for example, 7121 + ... + 12692.

It is an arithmetic number, because the mean of its divisors is an integer number (5944200).

Almost surely, 2^55199018 is an apocalyptic number.

55199018 is a deficient number, since it is larger than the sum of its proper divisors (39908182).

55199018 is a wasteful number, since it uses less digits than its factorization.

55199018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20021.

The product of its (nonzero) digits is 16200, while the sum is 38.

The square root of 55199018 is about 7429.6041617303. The cubic root of 55199018 is about 380.7533945166.

The spelling of 55199018 in words is "fifty-five million, one hundred ninety-nine thousand, eighteen".