421431223 has 2 divisors, whose sum is σ = 421431224. Its totient is φ = 421431222.

The previous prime is 421431211. The next prime is 421431239. The reversal of 421431223 is 322134124.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 421431223 - 2²⁵ = 387876791 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 421431194 and 421431203.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (421431253) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210715611 + 210715612.

It is an arithmetic number, because the mean of its divisors is an integer number (210715612).

Almost surely, 2^421431223 is an apocalyptic number.

421431223 is a deficient number, since it is larger than the sum of its proper divisors (1).

421431223 is an equidigital number, since it uses as much as digits as its factorization.

421431223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 22.

The square root of 421431223 is about 20528.7901007341. The cubic root of 421431223 is about 749.7369287725.

Adding to 421431223 its reverse (322134124), we get a palindrome (743565347).

The spelling of 421431223 in words is "four hundred twenty-one million, four hundred thirty-one thousand, two hundred twenty-three".