3221812641 has 4 divisors (see below), whose sum is σ = 4295750192. Its totient is φ = 2147875092.

The previous prime is 3221812637. The next prime is 3221812667. The reversal of 3221812641 is 1462181223.

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 an emirpimes, since its reverse is a distinct semiprime: 1462181223 = 3 ⋅487393741.

It is not a de Polignac number, because 3221812641 - 2² = 3221812637 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3221812599 and 3221812608.

It is not an unprimeable number, because it can be changed into a prime (3221812621) 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, 536968771 + ... + 536968776.

It is an arithmetic number, because the mean of its divisors is an integer number (1073937548).

Almost surely, 2^3221812641 is an apocalyptic number.

It is an amenable number.

3221812641 is a deficient number, since it is larger than the sum of its proper divisors (1073937551).

3221812641 is a wasteful number, since it uses less digits than its factorization.

3221812641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1073937550.

The product of its digits is 4608, while the sum is 30.

The square root of 3221812641 is about 56761.0133894736. The cubic root of 3221812641 is about 1476.9532893874.

Adding to 3221812641 its reverse (1462181223), we get a palindrome (4683993864).

The spelling of 3221812641 in words is "three billion, two hundred twenty-one million, eight hundred twelve thousand, six hundred forty-one".