4221434220 has 144 divisors (see below), whose sum is σ = 12709527264. Its totient is φ = 1043302400.

The previous prime is 4221434219. The next prime is 4221434311. The reversal of 4221434220 is 224341224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 5141410 + ... + 5142230.

It is an arithmetic number, because the mean of its divisors is an integer number (88260606).

Almost surely, 2^4221434220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4221434220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6354763632).

4221434220 is an abundant number, since it is smaller than the sum of its proper divisors (8488093044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

4221434220 is a wasteful number, since it uses less digits than its factorization.

4221434220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992 (or 919 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 4221434220 is about 64972.5651332930. The cubic root of 4221434220 is about 1616.1686397832.

Adding to 4221434220 its reverse (224341224), we get a palindrome (4445775444).

The spelling of 4221434220 in words is "four billion, two hundred twenty-one million, four hundred thirty-four thousand, two hundred twenty".