421324223 has 2 divisors, whose sum is σ = 421324224. Its totient is φ = 421324222.

The previous prime is 421324219. The next prime is 421324231. The reversal of 421324223 is 322423124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421324223 - 2² = 421324219 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421324283) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210662111 + 210662112.

It is an arithmetic number, because the mean of its divisors is an integer number (210662112).

Almost surely, 2^421324223 is an apocalyptic number.

421324223 is a deficient number, since it is larger than the sum of its proper divisors (1).

421324223 is an equidigital number, since it uses as much as digits as its factorization.

421324223 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 23.

The square root of 421324223 is about 20526.1838391845. The cubic root of 421324223 is about 749.6734714891.

Adding to 421324223 its reverse (322423124), we get a palindrome (743747347).

The spelling of 421324223 in words is "four hundred twenty-one million, three hundred twenty-four thousand, two hundred twenty-three".