420205223 has 4 divisors (see below), whose sum is σ = 424926720. Its totient is φ = 415483728.

The previous prime is 420205207. The next prime is 420205229. The reversal of 420205223 is 322502024.

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 420205223 - 2⁴ = 420205207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 420205195 and 420205204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (420205229) 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, 2360615 + ... + 2360792.

It is an arithmetic number, because the mean of its divisors is an integer number (106231680).

Almost surely, 2^420205223 is an apocalyptic number.

420205223 is a deficient number, since it is larger than the sum of its proper divisors (4721497).

420205223 is an equidigital number, since it uses as much as digits as its factorization.

420205223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4721496.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 420205223 is about 20498.9078489562. The cubic root of 420205223 is about 749.0091941666.

Adding to 420205223 its reverse (322502024), we get a palindrome (742707247).

The spelling of 420205223 in words is "four hundred twenty million, two hundred five thousand, two hundred twenty-three".