55305543 has 8 divisors (see below), whose sum is σ = 74008048. Its totient is φ = 36736704.

The previous prime is 55305533. The next prime is 55305559. The reversal of 55305543 is 34550355.

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

It is not a de Polignac number, because 55305543 - 2⁸ = 55305287 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 55305543.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55305533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32446 + ... + 34107.

It is an arithmetic number, because the mean of its divisors is an integer number (9251006).

Almost surely, 2^55305543 is an apocalyptic number.

55305543 is a deficient number, since it is larger than the sum of its proper divisors (18702505).

55305543 is a wasteful number, since it uses less digits than its factorization.

55305543 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66833.

The product of its (nonzero) digits is 22500, while the sum is 30.

The square root of 55305543 is about 7436.7696616206. The cubic root of 55305543 is about 380.9981675431.

Adding to 55305543 its reverse (34550355), we get a palindrome (89855898).

The spelling of 55305543 in words is "fifty-five million, three hundred five thousand, five hundred forty-three".