4165244221 has 4 divisors (see below), whose sum is σ = 4165373952. Its totient is φ = 4165114492.

The previous prime is 4165244207. The next prime is 4165244261. The reversal of 4165244221 is 1224425614.

4165244221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 4165244221 - 2¹¹ = 4165242173 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 (4165244261) 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, 22686 + ... + 94048.

It is an arithmetic number, because the mean of its divisors is an integer number (1041343488).

Almost surely, 2^4165244221 is an apocalyptic number.

It is an amenable number.

4165244221 is a deficient number, since it is larger than the sum of its proper divisors (129731).

4165244221 is an equidigital number, since it uses as much as digits as its factorization.

4165244221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129730.

The product of its digits is 15360, while the sum is 31.

The square root of 4165244221 is about 64538.7032795051. The cubic root of 4165244221 is about 1608.9658393423.

Adding to 4165244221 its reverse (1224425614), we get a palindrome (5389669835).

The spelling of 4165244221 in words is "four billion, one hundred sixty-five million, two hundred forty-four thousand, two hundred twenty-one".