55127881 has 4 divisors (see below), whose sum is σ = 55479172. Its totient is φ = 54776592.

The previous prime is 55127867. The next prime is 55127893. The reversal of 55127881 is 18872155.

55127881 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.

It can be written as a sum of positive squares in 2 ways, for example, as 7241481 + 47886400 = 2691^2 + 6920^2 .

It is a cyclic number.

It is not a de Polignac number, because 55127881 - 2²⁵ = 21573449 is a prime.

It is a super-2 number, since 2×55127881² = 6078166527100322, which contains 22 as substring.

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 55127881.

It is not an unprimeable number, because it can be changed into a prime (55127081) 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, 175410 + ... + 175723.

It is an arithmetic number, because the mean of its divisors is an integer number (13869793).

Almost surely, 2^55127881 is an apocalyptic number.

It is an amenable number.

55127881 is a deficient number, since it is larger than the sum of its proper divisors (351291).

55127881 is a wasteful number, since it uses less digits than its factorization.

55127881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351290.

The product of its digits is 22400, while the sum is 37.

The square root of 55127881 is about 7424.8152165559. The cubic root of 55127881 is about 380.5897605791.

The spelling of 55127881 in words is "fifty-five million, one hundred twenty-seven thousand, eight hundred eighty-one".