55727191 has 8 divisors (see below), whose sum is σ = 60074784. Its totient is φ = 51388320.

The previous prime is 55727167. The next prime is 55727197. The reversal of 55727191 is 19172755.

55727191 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 55727191 - 2²³ = 47338583 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55727191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55727197) 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 7 ways as a sum of consecutive naturals, for example, 18225 + ... + 21061.

It is an arithmetic number, because the mean of its divisors is an integer number (7509348).

Almost surely, 2^55727191 is an apocalyptic number.

55727191 is a deficient number, since it is larger than the sum of its proper divisors (4347593).

55727191 is a wasteful number, since it uses less digits than its factorization.

55727191 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4361.

The product of its digits is 22050, while the sum is 37.

The square root of 55727191 is about 7465.0647016620. The cubic root of 55727191 is about 381.9639572912.

The spelling of 55727191 in words is "fifty-five million, seven hundred twenty-seven thousand, one hundred ninety-one".