4226440621 has 4 divisors (see below), whose sum is σ = 4551551452. Its totient is φ = 3901329792.

The previous prime is 4226440613. The next prime is 4226440637. The reversal of 4226440621 is 1260446224.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2558943396 + 1667497225 = 50586^2 + 40835^2 .

It is a cyclic number.

It is not a de Polignac number, because 4226440621 - 2³ = 4226440613 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 (4226440651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162555396 + ... + 162555421.

It is an arithmetic number, because the mean of its divisors is an integer number (1137887863).

Almost surely, 2^4226440621 is an apocalyptic number.

It is an amenable number.

4226440621 is a deficient number, since it is larger than the sum of its proper divisors (325110831).

4226440621 is a wasteful number, since it uses less digits than its factorization.

4226440621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325110830.

The product of its (nonzero) digits is 18432, while the sum is 31.

The square root of 4226440621 is about 65011.0807555143. The cubic root of 4226440621 is about 1616.8072846452.

Adding to 4226440621 its reverse (1260446224), we get a palindrome (5486886845).

The spelling of 4226440621 in words is "four billion, two hundred twenty-six million, four hundred forty thousand, six hundred twenty-one".