55091011 has 4 divisors (see below), whose sum is σ = 55141192. Its totient is φ = 55040832.

The previous prime is 55090993. The next prime is 55091017. The reversal of 55091011 is 11019055.

55091011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11019055 = 5 ⋅2203811.

It is a cyclic number.

It is not a de Polignac number, because 55091011 - 2⁵ = 55090979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55091017) 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, 23406 + ... + 25651.

It is an arithmetic number, because the mean of its divisors is an integer number (13785298).

Almost surely, 2^55091011 is an apocalyptic number.

55091011 is a deficient number, since it is larger than the sum of its proper divisors (50181).

55091011 is a wasteful number, since it uses less digits than its factorization.

55091011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50180.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 55091011 is about 7422.3319111988. The cubic root of 55091011 is about 380.5048944237.

The spelling of 55091011 in words is "fifty-five million, ninety-one thousand, eleven".