3221251641 has 6 divisors (see below), whose sum is σ = 4652919050. Its totient is φ = 2147501088.

The previous prime is 3221251541. The next prime is 3221251687. The reversal of 3221251641 is 1461521223.

3221251641 is a `hidden beast` number, since 3 + 2 + 2 + 12 + 5 + 1 + 641 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3115984041 + 105267600 = 55821^2 + 10260^2 .

It is not a de Polignac number, because 3221251641 - 2⁷ = 3221251513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221251541) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178958416 + ... + 178958433.

Almost surely, 2^3221251641 is an apocalyptic number.

It is an amenable number.

3221251641 is a deficient number, since it is larger than the sum of its proper divisors (1431667409).

3221251641 is a wasteful number, since it uses less digits than its factorization.

3221251641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357916855 (or 357916852 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 3221251641 is about 56756.0714020976. The cubic root of 3221251641 is about 1476.8675592945.

Adding to 3221251641 its reverse (1461521223), we get a palindrome (4682772864).

The spelling of 3221251641 in words is "three billion, two hundred twenty-one million, two hundred fifty-one thousand, six hundred forty-one".