423095221 has 2 divisors, whose sum is σ = 423095222. Its totient is φ = 423095220.

The previous prime is 423095219. The next prime is 423095251. The reversal of 423095221 is 122590324.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 369600625 + 53494596 = 19225^2 + 7314^2 .

It is a cyclic number.

It is not a de Polignac number, because 423095221 - 2¹ = 423095219 is a prime.

Together with 423095219, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 423095221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (423095251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 211547610 + 211547611.

It is an arithmetic number, because the mean of its divisors is an integer number (211547611).

Almost surely, 2^423095221 is an apocalyptic number.

It is an amenable number.

423095221 is a deficient number, since it is larger than the sum of its proper divisors (1).

423095221 is an equidigital number, since it uses as much as digits as its factorization.

423095221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 423095221 is about 20569.2785726675. The cubic root of 423095221 is about 750.7223978909.

The spelling of 423095221 in words is "four hundred twenty-three million, ninety-five thousand, two hundred twenty-one".