3221545231 has 2 divisors, whose sum is σ = 3221545232. Its totient is φ = 3221545230.

The previous prime is 3221545211. The next prime is 3221545253. The reversal of 3221545231 is 1325451223.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 3221545231 - 2¹⁷ = 3221414159 is a prime.

It is a super-2 number, since 2×3221545231² = 20756707350757686722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 3221545231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3221545211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1610772615 + 1610772616.

It is an arithmetic number, because the mean of its divisors is an integer number (1610772616).

Almost surely, 2^3221545231 is an apocalyptic number.

3221545231 is a deficient number, since it is larger than the sum of its proper divisors (1).

3221545231 is an equidigital number, since it uses as much as digits as its factorization.

3221545231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7200, while the sum is 28.

The square root of 3221545231 is about 56758.6577624947. The cubic root of 3221545231 is about 1476.9124259512.

Adding to 3221545231 its reverse (1325451223), we get a palindrome (4546996454).

The spelling of 3221545231 in words is "three billion, two hundred twenty-one million, five hundred forty-five thousand, two hundred thirty-one".