3255221021 has 4 divisors (see below), whose sum is σ = 3505622652. Its totient is φ = 3004819392.

The previous prime is 3255220967. The next prime is 3255221033. The reversal of 3255221021 is 1201225523.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1201225523 = 4363 ⋅275321.

It can be written as a sum of positive squares in 2 ways, for example, as 1384658521 + 1870562500 = 37211^2 + 43250^2 .

It is a cyclic number.

It is not a de Polignac number, because 3255221021 - 2⁶ = 3255220957 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3255221051) 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, 125200796 + ... + 125200821.

It is an arithmetic number, because the mean of its divisors is an integer number (876405663).

Almost surely, 2^3255221021 is an apocalyptic number.

It is an amenable number.

3255221021 is a deficient number, since it is larger than the sum of its proper divisors (250401631).

3255221021 is a wasteful number, since it uses less digits than its factorization.

3255221021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250401630.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 3255221021 is about 57054.5442624862. The cubic root of 3255221021 is about 1482.0408023586.

Adding to 3255221021 its reverse (1201225523), we get a palindrome (4456446544).

The spelling of 3255221021 in words is "three billion, two hundred fifty-five million, two hundred twenty-one thousand, twenty-one".