55421040223 has 4 divisors (see below), whose sum is σ = 56329581928. Its totient is φ = 54512498520.

The previous prime is 55421040211. The next prime is 55421040239. The reversal of 55421040223 is 32204012455.

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 55421040223 - 2⁹ = 55421039711 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55421040191 and 55421040200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55421046223) 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, 454270761 + ... + 454270882.

It is an arithmetic number, because the mean of its divisors is an integer number (14082395482).

Almost surely, 2^55421040223 is an apocalyptic number.

55421040223 is a deficient number, since it is larger than the sum of its proper divisors (908541705).

55421040223 is an equidigital number, since it uses as much as digits as its factorization.

55421040223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 908541704.

The product of its (nonzero) digits is 9600, while the sum is 28.

Adding to 55421040223 its reverse (32204012455), we get a palindrome (87625052678).

The spelling of 55421040223 in words is "fifty-five billion, four hundred twenty-one million, forty thousand, two hundred twenty-three".