55081091 has 8 divisors (see below), whose sum is σ = 60070080. Its totient is φ = 50199552.

The previous prime is 55081087. The next prime is 55081093. The reversal of 55081091 is 19018055.

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

It is not a de Polignac number, because 55081091 - 2² = 55081087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55081093) by changing a digit.

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, 25790 + ... + 27843.

It is an arithmetic number, because the mean of its divisors is an integer number (7508760).

Almost surely, 2^55081091 is an apocalyptic number.

55081091 is a deficient number, since it is larger than the sum of its proper divisors (4988989).

55081091 is a wasteful number, since it uses less digits than its factorization.

55081091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53725.

The product of its (nonzero) digits is 1800, while the sum is 29.

The square root of 55081091 is about 7421.6636275164. The cubic root of 55081091 is about 380.4820544294.

The spelling of 55081091 in words is "fifty-five million, eighty-one thousand, ninety-one".