55000090 has 8 divisors (see below), whose sum is σ = 99000180. Its totient is φ = 22000032.

The previous prime is 55000069. The next prime is 55000091. The reversal of 55000090 is 9000055.

55000090 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 54508689 + 491401 = 7383^2 + 701^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (55000091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2749995 + ... + 2750014.

Almost surely, 2^55000090 is an apocalyptic number.

55000090 is a deficient number, since it is larger than the sum of its proper divisors (44000090).

55000090 is a wasteful number, since it uses less digits than its factorization.

55000090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5500016.

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

The square root of 55000090 is about 7416.2045548919. The cubic root of 55000090 is about 380.2954535098.

The spelling of 55000090 in words is "fifty-five million, ninety", and thus it is an aban number and an uban number.