4221447581 has 8 divisors (see below), whose sum is σ = 4623228960. Its totient is φ = 3830674032.

The previous prime is 4221447541. The next prime is 4221447583. The reversal of 4221447581 is 1857441224.

4221447581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4221447581 - 2²² = 4217253277 is a prime.

It is a super-2 number, since 2×4221447581² = 35641239358261503122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4221447583) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2751155 + ... + 2752688.

It is an arithmetic number, because the mean of its divisors is an integer number (577903620).

Almost surely, 2^4221447581 is an apocalyptic number.

It is an amenable number.

4221447581 is a deficient number, since it is larger than the sum of its proper divisors (401781379).

4221447581 is a wasteful number, since it uses less digits than its factorization.

4221447581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5503915.

The product of its digits is 71680, while the sum is 38.

The square root of 4221447581 is about 64972.6679535326. The cubic root of 4221447581 is about 1616.1703448598.

The spelling of 4221447581 in words is "four billion, two hundred twenty-one million, four hundred forty-seven thousand, five hundred eighty-one".