223221444455 has 4 divisors (see below), whose sum is σ = 267865733352. Its totient is φ = 178577155560.

The previous prime is 223221444449. The next prime is 223221444473. The reversal of 223221444455 is 554444122322.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 554444122322 = 2 ⋅277222061161.

It is not a de Polignac number, because 223221444455 - 2²⁴ = 223204667239 is a prime.

It is a super-3 number, since 3×223221444455³ (a number of 35 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22322144441 + ... + 22322144450.

It is an arithmetic number, because the mean of its divisors is an integer number (66966433338).

Almost surely, 2^223221444455 is an apocalyptic number.

223221444455 is a deficient number, since it is larger than the sum of its proper divisors (44644288897).

223221444455 is an equidigital number, since it uses as much as digits as its factorization.

223221444455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44644288896.

The product of its digits is 307200, while the sum is 38.

Adding to 223221444455 its reverse (554444122322), we get a palindrome (777665566777).

The spelling of 223221444455 in words is "two hundred twenty-three billion, two hundred twenty-one million, four hundred forty-four thousand, four hundred fifty-five".