3221520241 has 4 divisors (see below), whose sum is σ = 3224988900. Its totient is φ = 3218051584.

The previous prime is 3221520229. The next prime is 3221520257. The reversal of 3221520241 is 1420251223.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1420251223 = 397 ⋅3577459.

It can be written as a sum of positive squares in 2 ways, for example, as 1178480241 + 2043040000 = 34329^2 + 45200^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221520241 - 2⁹ = 3221519729 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221560241) 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, 1732936 + ... + 1734793.

It is an arithmetic number, because the mean of its divisors is an integer number (806247225).

Almost surely, 2^3221520241 is an apocalyptic number.

It is an amenable number.

3221520241 is a deficient number, since it is larger than the sum of its proper divisors (3468659).

3221520241 is an equidigital number, since it uses as much as digits as its factorization.

3221520241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3468658.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 3221520241 is about 56758.4376194412. The cubic root of 3221520241 is about 1476.9086070657.

Adding to 3221520241 its reverse (1420251223), we get a palindrome (4641771464).

The spelling of 3221520241 in words is "three billion, two hundred twenty-one million, five hundred twenty thousand, two hundred forty-one".