4065488221 has 8 divisors (see below), whose sum is σ = 4215972600. Its totient is φ = 3915690240.

The previous prime is 4065488201. The next prime is 4065488267. The reversal of 4065488221 is 1228845604.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1161787225 + 2903700996 = 34085^2 + 53886^2 .

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 4065488221 - 2⁷ = 4065488093 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 (4065488201) 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, 159520 + ... + 183241.

It is an arithmetic number, because the mean of its divisors is an integer number (526996575).

Almost surely, 2^4065488221 is an apocalyptic number.

It is an amenable number.

4065488221 is a deficient number, since it is larger than the sum of its proper divisors (150484379).

4065488221 is a wasteful number, since it uses less digits than its factorization.

4065488221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 343199.

The product of its (nonzero) digits is 122880, while the sum is 40.

The square root of 4065488221 is about 63761.1811449568. The cubic root of 4065488221 is about 1596.0172061815.

The spelling of 4065488221 in words is "four billion, sixty-five million, four hundred eighty-eight thousand, two hundred twenty-one".