55542443 has 4 divisors (see below), whose sum is σ = 60591768. Its totient is φ = 50493120.

The previous prime is 55542437. The next prime is 55542467. The reversal of 55542443 is 34424555.

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 55542443 - 2⁴ = 55542427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (55542433) 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, 2524646 + ... + 2524667.

It is an arithmetic number, because the mean of its divisors is an integer number (15147942).

Almost surely, 2^55542443 is an apocalyptic number.

55542443 is a deficient number, since it is larger than the sum of its proper divisors (5049325).

55542443 is a wasteful number, since it uses less digits than its factorization.

55542443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5049324.

The product of its digits is 48000, while the sum is 32.

The square root of 55542443 is about 7452.6802561226. The cubic root of 55542443 is about 381.5413915641.

Adding to 55542443 its reverse (34424555), we get a palindrome (89966998).

It can be divided in two parts, 5554 and 2443, that added together give a palindrome (7997).

The spelling of 55542443 in words is "fifty-five million, five hundred forty-two thousand, four hundred forty-three".