3281225021 has 2 divisors, whose sum is σ = 3281225022. Its totient is φ = 3281225020.

The previous prime is 3281224979. The next prime is 3281225047. The reversal of 3281225021 is 1205221823.

3281225021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (3281225047) can be obtained adding 3281225021 to its sum of digits (26).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2066702521 + 1214522500 = 45461^2 + 34850^2 .

It is a cyclic number.

It is not a de Polignac number, because 3281225021 - 2¹⁰ = 3281223997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (3281225221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1640612510 + 1640612511.

It is an arithmetic number, because the mean of its divisors is an integer number (1640612511).

Almost surely, 2^3281225021 is an apocalyptic number.

It is an amenable number.

3281225021 is a deficient number, since it is larger than the sum of its proper divisors (1).

3281225021 is an equidigital number, since it uses as much as digits as its factorization.

3281225021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 3281225021 is about 57281.9781519458. The cubic root of 3281225021 is about 1485.9767174326.

Adding to 3281225021 its reverse (1205221823), we get a palindrome (4486446844).

The spelling of 3281225021 in words is "three billion, two hundred eighty-one million, two hundred twenty-five thousand, twenty-one".