4023256221 has 6 divisors (see below), whose sum is σ = 5811370110. Its totient is φ = 2682170808.

The previous prime is 4023256201. The next prime is 4023256243. The reversal of 4023256221 is 1226523204.

It is a happy number.

4023256221 is a `hidden beast` number, since 4 + 0 + 2 + 32 + 5 + 622 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3983376996 + 39879225 = 63114^2 + 6315^2 .

It is not a de Polignac number, because 4023256221 - 2¹³ = 4023248029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4023256201) 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, 223514226 + ... + 223514243.

It is an arithmetic number, because the mean of its divisors is an integer number (968561685).

Almost surely, 2^4023256221 is an apocalyptic number.

It is an amenable number.

4023256221 is a deficient number, since it is larger than the sum of its proper divisors (1788113889).

4023256221 is a wasteful number, since it uses less digits than its factorization.

4023256221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447028475 (or 447028472 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 4023256221 is about 63429.1433096806. The cubic root of 4023256221 is about 1590.4715214811.

Adding to 4023256221 its reverse (1226523204), we get a palindrome (5249779425).

The spelling of 4023256221 in words is "four billion, twenty-three million, two hundred fifty-six thousand, two hundred twenty-one".