421204223 has 32 divisors (see below), whose sum is σ = 507451392. Its totient is φ = 345139200.

The previous prime is 421204219. The next prime is 421204229. The reversal of 421204223 is 322402124.

It is a cyclic number.

It is not a de Polignac number, because 421204223 - 2² = 421204219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 421204195 and 421204204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (421204229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 654740 + ... + 655382.

It is an arithmetic number, because the mean of its divisors is an integer number (15857856).

Almost surely, 2^421204223 is an apocalyptic number.

421204223 is a deficient number, since it is larger than the sum of its proper divisors (86247169).

421204223 is a wasteful number, since it uses less digits than its factorization.

421204223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 421204223 is about 20523.2605353048. The cubic root of 421204223 is about 749.6022916599.

Adding to 421204223 its reverse (322402124), we get a palindrome (743606347).

The spelling of 421204223 in words is "four hundred twenty-one million, two hundred four thousand, two hundred twenty-three".