423022221 has 12 divisors (see below), whose sum is σ = 627546972. Its totient is φ = 274392576.

The previous prime is 423022219. The next prime is 423022273. The reversal of 423022221 is 122220324.

423022221 is a `hidden beast` number, since 423 + 0 + 22 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 156875625 + 266146596 = 12525^2 + 16314^2 .

It is not a de Polignac number, because 423022221 - 2¹ = 423022219 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 423022194 and 423022203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (423022021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 634836 + ... + 635501.

It is an arithmetic number, because the mean of its divisors is an integer number (52295581).

Almost surely, 2^423022221 is an apocalyptic number.

It is an amenable number.

423022221 is a deficient number, since it is larger than the sum of its proper divisors (204524751).

423022221 is a wasteful number, since it uses less digits than its factorization.

423022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1270380 (or 1270377 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 423022221 is about 20567.5040051048. The cubic root of 423022221 is about 750.6792193624.

Adding to 423022221 its reverse (122220324), we get a palindrome (545242545).

The spelling of 423022221 in words is "four hundred twenty-three million, twenty-two thousand, two hundred twenty-one".