55543223 has 4 divisors (see below), whose sum is σ = 55563768. Its totient is φ = 55522680.

The previous prime is 55543219. The next prime is 55543231. The reversal of 55543223 is 32234555.

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 55543223 - 2² = 55543219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55543273) 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, 5468 + ... + 11873.

It is an arithmetic number, because the mean of its divisors is an integer number (13890942).

Almost surely, 2^55543223 is an apocalyptic number.

55543223 is a deficient number, since it is larger than the sum of its proper divisors (20545).

55543223 is a wasteful number, since it uses less digits than its factorization.

55543223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20544.

The product of its digits is 18000, while the sum is 29.

The square root of 55543223 is about 7452.7325861056. The cubic root of 55543223 is about 381.5431775910.

Adding to 55543223 its reverse (32234555), we get a palindrome (87777778).

The spelling of 55543223 in words is "fifty-five million, five hundred forty-three thousand, two hundred twenty-three".