3540332221 has 4 divisors (see below), whose sum is σ = 3548988700. Its totient is φ = 3531675744.

The previous prime is 3540332203. The next prime is 3540332233. The reversal of 3540332221 is 1222330453.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1222330453 = 311 ⋅3930323.

It can be written as a sum of positive squares in 2 ways, for example, as 2085748900 + 1454583321 = 45670^2 + 38139^2 .

It is a cyclic number.

It is not a de Polignac number, because 3540332221 - 2⁵ = 3540332189 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 (3540332251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4327626 + ... + 4328443.

It is an arithmetic number, because the mean of its divisors is an integer number (887247175).

Almost surely, 2^3540332221 is an apocalyptic number.

It is an amenable number.

3540332221 is a deficient number, since it is larger than the sum of its proper divisors (8656479).

3540332221 is an equidigital number, since it uses as much as digits as its factorization.

3540332221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8656478.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 3540332221 is about 59500.6909287615. The cubic root of 3540332221 is about 1524.1042444991.

Adding to 3540332221 its reverse (1222330453), we get a palindrome (4762662674).

The spelling of 3540332221 in words is "three billion, five hundred forty million, three hundred thirty-two thousand, two hundred twenty-one".