4084566221 has 4 divisors (see below), whose sum is σ = 4091899932. Its totient is φ = 4077232512.

The previous prime is 4084566181. The next prime is 4084566223. The reversal of 4084566221 is 1226654804.

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 1392409225 + 2692156996 = 37315^2 + 51886^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4084566221 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 (4084566223) 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, 3666020 + ... + 3667133.

It is an arithmetic number, because the mean of its divisors is an integer number (1022974983).

Almost surely, 2^4084566221 is an apocalyptic number.

It is an amenable number.

4084566221 is a deficient number, since it is larger than the sum of its proper divisors (7333711).

4084566221 is an equidigital number, since it uses as much as digits as its factorization.

4084566221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7333710.

The product of its (nonzero) digits is 92160, while the sum is 38.

The square root of 4084566221 is about 63910.6111768617. The cubic root of 4084566221 is about 1598.5098392617.

The spelling of 4084566221 in words is "four billion, eighty-four million, five hundred sixty-six thousand, two hundred twenty-one".