4065424221 has 4 divisors (see below), whose sum is σ = 5420565632. Its totient is φ = 2710282812.

The previous prime is 4065424219. The next prime is 4065424241. The reversal of 4065424221 is 1224245604.

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.

It is not a de Polignac number, because 4065424221 - 2¹ = 4065424219 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 (4065424241) 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, 677570701 + ... + 677570706.

It is an arithmetic number, because the mean of its divisors is an integer number (1355141408).

Almost surely, 2^4065424221 is an apocalyptic number.

It is an amenable number.

4065424221 is a deficient number, since it is larger than the sum of its proper divisors (1355141411).

4065424221 is a wasteful number, since it uses less digits than its factorization.

4065424221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355141410.

The product of its (nonzero) digits is 15360, while the sum is 30.

The square root of 4065424221 is about 63760.6792702211. The cubic root of 4065424221 is about 1596.0088311614.

Adding to 4065424221 its reverse (1224245604), we get a palindrome (5289669825).

The spelling of 4065424221 in words is "four billion, sixty-five million, four hundred twenty-four thousand, two hundred twenty-one".