421922233 has 2 divisors, whose sum is σ = 421922234. Its totient is φ = 421922232.

The previous prime is 421922231. The next prime is 421922251. The reversal of 421922233 is 332229124.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 411765264 + 10156969 = 20292^2 + 3187^2 .

It is a cyclic number.

It is not a de Polignac number, because 421922233 - 2¹ = 421922231 is a prime.

Together with 421922231, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (421922231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 210961116 + 210961117.

It is an arithmetic number, because the mean of its divisors is an integer number (210961117).

Almost surely, 2^421922233 is an apocalyptic number.

It is an amenable number.

421922233 is a deficient number, since it is larger than the sum of its proper divisors (1).

421922233 is an equidigital number, since it uses as much as digits as its factorization.

421922233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 421922233 is about 20540.7456777986. The cubic root of 421922233 is about 750.0279888814.

The spelling of 421922233 in words is "four hundred twenty-one million, nine hundred twenty-two thousand, two hundred thirty-three".