3220742641 has 4 divisors (see below), whose sum is σ = 3252631284. Its totient is φ = 3188854000.

The previous prime is 3220742617. The next prime is 3220742653. The reversal of 3220742641 is 1462470223.

It is a happy number.

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 2184160225 + 1036582416 = 46735^2 + 32196^2 .

It is a cyclic number.

It is not a de Polignac number, because 3220742641 - 2⁷ = 3220742513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3220742671) 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, 15944170 + ... + 15944371.

It is an arithmetic number, because the mean of its divisors is an integer number (813157821).

Almost surely, 2^3220742641 is an apocalyptic number.

It is an amenable number.

3220742641 is a deficient number, since it is larger than the sum of its proper divisors (31888643).

3220742641 is a wasteful number, since it uses less digits than its factorization.

3220742641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31888642.

The product of its (nonzero) digits is 16128, while the sum is 31.

The square root of 3220742641 is about 56751.5871231810. The cubic root of 3220742641 is about 1476.7897670500.

The spelling of 3220742641 in words is "three billion, two hundred twenty million, seven hundred forty-two thousand, six hundred forty-one".