3221020445 has 8 divisors (see below), whose sum is σ = 3870937944. Its totient is φ = 2573007424.

The previous prime is 3221020421. The next prime is 3221020457. The reversal of 3221020445 is 5440201223.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 998180836 + 2222839609 = 31594^2 + 47147^2 .

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 3221020445 - 2¹² = 3221016349 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3221020445.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472394 + ... + 479163.

It is an arithmetic number, because the mean of its divisors is an integer number (483867243).

Almost surely, 2^3221020445 is an apocalyptic number.

It is an amenable number.

3221020445 is a deficient number, since it is larger than the sum of its proper divisors (649917499).

3221020445 is an equidigital number, since it uses as much as digits as its factorization.

3221020445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 952239.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 3221020445 is about 56754.0346142898. The cubic root of 3221020445 is about 1476.8322258196.

Adding to 3221020445 its reverse (5440201223), we get a palindrome (8661221668).

The spelling of 3221020445 in words is "three billion, two hundred twenty-one million, twenty thousand, four hundred forty-five".