420443227 has 2 divisors, whose sum is σ = 420443228. Its totient is φ = 420443226.

The previous prime is 420443183. The next prime is 420443249. The reversal of 420443227 is 722344024.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-420443227 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 420443195 and 420443204.

It is not a weakly prime, because it can be changed into another prime (420443627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210221613 + 210221614.

It is an arithmetic number, because the mean of its divisors is an integer number (210221614).

Almost surely, 2^420443227 is an apocalyptic number.

420443227 is a deficient number, since it is larger than the sum of its proper divisors (1).

420443227 is an equidigital number, since it uses as much as digits as its factorization.

420443227 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10752, while the sum is 28.

The square root of 420443227 is about 20504.7123120516. The cubic root of 420443227 is about 749.1505802706.

The spelling of 420443227 in words is "four hundred twenty million, four hundred forty-three thousand, two hundred twenty-seven".