55871443 has 4 divisors (see below), whose sum is σ = 57381520. Its totient is φ = 54361368.

The previous prime is 55871411. The next prime is 55871507. The reversal of 55871443 is 34417855.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34417855 = 5 ⋅6883571.

It is a cyclic number.

It is not a de Polignac number, because 55871443 - 2⁵ = 55871411 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37), and also a Moran number because the ratio is a prime number: 1510039 = 55871443 / (5 + 5 + 8 + 7 + 1 + 4 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55871143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 754983 + ... + 755056.

It is an arithmetic number, because the mean of its divisors is an integer number (14345380).

Almost surely, 2^55871443 is an apocalyptic number.

55871443 is a deficient number, since it is larger than the sum of its proper divisors (1510077).

55871443 is a wasteful number, since it uses less digits than its factorization.

55871443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510076.

The product of its digits is 67200, while the sum is 37.

The square root of 55871443 is about 7474.7202623242. The cubic root of 55871443 is about 382.2932495093.

The spelling of 55871443 in words is "fifty-five million, eight hundred seventy-one thousand, four hundred forty-three".