55090 has 16 divisors (see below), whose sum is σ = 113472. Its totient is φ = 18864.

The previous prime is 55079. The next prime is 55103. The reversal of 55090 is 9055.

55090 = T₆₄ + T₆₅ + ... + T₈₃.

It is a nialpdrome in base 16.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 324 + ... + 463.

It is an arithmetic number, because the mean of its divisors is an integer number (7092).

2⁵⁵⁰⁹⁰ is an apocalyptic number.

55090 is an abundant number, since it is smaller than the sum of its proper divisors (58382).

It is a weird number, because it is abundant, but not a pseudoperfect number.

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56736).

55090 is a wasteful number, since it uses less digits than its factorization.

55090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801.

The product of its (nonzero) digits is 225, while the sum is 19.

The square root of 55090 is about 234.7125902034. The cubic root of 55090 is about 38.0502566804.

The spelling of 55090 in words is "fifty-five thousand, ninety".