55381171 has 4 divisors (see below), whose sum is σ = 57789072. Its totient is φ = 52973272.

The previous prime is 55381163. The next prime is 55381177. The reversal of 55381171 is 17118355.

55381171 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 is a cyclic number.

It is not a de Polignac number, because 55381171 - 2³ = 55381163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55381177) 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, 1203916 + ... + 1203961.

It is an arithmetic number, because the mean of its divisors is an integer number (14447268).

Almost surely, 2^55381171 is an apocalyptic number.

55381171 is a deficient number, since it is larger than the sum of its proper divisors (2407901).

55381171 is a wasteful number, since it uses less digits than its factorization.

55381171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2407900.

The product of its digits is 4200, while the sum is 31.

The square root of 55381171 is about 7441.8526591165. The cubic root of 55381171 is about 381.1717547569.

The spelling of 55381171 in words is "fifty-five million, three hundred eighty-one thousand, one hundred seventy-one".