55198 has 16 divisors (see below), whose sum is σ = 97776. Its totient is φ = 23040.

The previous prime is 55171. The next prime is 55201. The reversal of 55198 is 89155.

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 7 ways as a sum of consecutive naturals, for example, 190 + ... + 382.

It is an arithmetic number, because the mean of its divisors is an integer number (6111).

2⁵⁵¹⁹⁸ is an apocalyptic number.

55198 is a deficient number, since it is larger than the sum of its proper divisors (42578).

55198 is a wasteful number, since it uses less digits than its factorization.

55198 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219.

The product of its digits is 1800, while the sum is 28.

The square root of 55198 is about 234.9425461682. The cubic root of 55198 is about 38.0751053839.

It can be divided in two parts, 55 and 198, that added together give a triangular number (253 = T₂₂).

The spelling of 55198 in words is "fifty-five thousand, one hundred ninety-eight".