3220430321 has 4 divisors (see below), whose sum is σ = 3298977444. Its totient is φ = 3141883200.

The previous prime is 3220430287. The next prime is 3220430329. The reversal of 3220430321 is 1230340223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1230340223 = 7 ⋅175762889.

It can be written as a sum of positive squares in 2 ways, for example, as 1162810000 + 2057620321 = 34100^2 + 45361^2 .

It is a cyclic number.

It is not a de Polignac number, because 3220430321 - 2¹⁸ = 3220168177 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3220430293 and 3220430302.

It is not an unprimeable number, because it can be changed into a prime (3220430329) 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, 39273500 + ... + 39273581.

It is an arithmetic number, because the mean of its divisors is an integer number (824744361).

Almost surely, 2^3220430321 is an apocalyptic number.

It is an amenable number.

3220430321 is a deficient number, since it is larger than the sum of its proper divisors (78547123).

3220430321 is an equidigital number, since it uses as much as digits as its factorization.

3220430321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78547122.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 3220430321 is about 56748.8354153634. The cubic root of 3220430321 is about 1476.7420300381.

Adding to 3220430321 its reverse (1230340223), we get a palindrome (4450770544).

The spelling of 3220430321 in words is "three billion, two hundred twenty million, four hundred thirty thousand, three hundred twenty-one".