4223236221 has 6 divisors (see below), whose sum is σ = 6100230110. Its totient is φ = 2815490808.

The previous prime is 4223236219. The next prime is 4223236231. The reversal of 4223236221 is 1226323224.

It is a happy number.

4223236221 is a `hidden beast` number, since 4 + 2 + 2 + 32 + 3 + 622 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3409275321 + 813960900 = 58389^2 + 28530^2 .

It is not a de Polignac number, because 4223236221 - 2¹ = 4223236219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4223236231) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 234624226 + ... + 234624243.

Almost surely, 2^4223236221 is an apocalyptic number.

It is an amenable number.

4223236221 is a deficient number, since it is larger than the sum of its proper divisors (1876993889).

4223236221 is a wasteful number, since it uses less digits than its factorization.

4223236221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 469248475 (or 469248472 counting only the distinct ones).

The product of its digits is 6912, while the sum is 27.

The square root of 4223236221 is about 64986.4310529514. The cubic root of 4223236221 is about 1616.3985713701.

Adding to 4223236221 its reverse (1226323224), we get a palindrome (5449559445).

The spelling of 4223236221 in words is "four billion, two hundred twenty-three million, two hundred thirty-six thousand, two hundred twenty-one".