55453440223 has 4 divisors (see below), whose sum is σ = 58372042360. Its totient is φ = 52534838088.

The previous prime is 55453440209. The next prime is 55453440283. The reversal of 55453440223 is 32204435455.

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 55453440223 - 2³³ = 46863505631 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 (55453440283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1459301040 + ... + 1459301077.

It is an arithmetic number, because the mean of its divisors is an integer number (14593010590).

Almost surely, 2^55453440223 is an apocalyptic number.

55453440223 is a deficient number, since it is larger than the sum of its proper divisors (2918602137).

55453440223 is a wasteful number, since it uses less digits than its factorization.

55453440223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918602136.

The product of its (nonzero) digits is 288000, while the sum is 37.

Adding to 55453440223 its reverse (32204435455), we get a palindrome (87657875678).

The spelling of 55453440223 in words is "fifty-five billion, four hundred fifty-three million, four hundred forty thousand, two hundred twenty-three".