3521005221 has 8 divisors (see below), whose sum is σ = 4695032160. Its totient is φ = 2347157552.

The previous prime is 3521005219. The next prime is 3521005223. The reversal of 3521005221 is 1225001253.

It is an interprime number because it is at equal distance from previous prime (3521005219) and next prime (3521005223).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3521005221 - 2¹ = 3521005219 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3521005223) 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 7 ways as a sum of consecutive naturals, for example, 10915 + ... + 84623.

It is an arithmetic number, because the mean of its divisors is an integer number (586879020).

Almost surely, 2^3521005221 is an apocalyptic number.

It is an amenable number.

3521005221 is a deficient number, since it is larger than the sum of its proper divisors (1174026939).

3521005221 is a wasteful number, since it uses less digits than its factorization.

3521005221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89635.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 3521005221 is about 59338.0587902907. The cubic root of 3521005221 is about 1521.3257738438.

Adding to 3521005221 its reverse (1225001253), we get a palindrome (4746006474).

The spelling of 3521005221 in words is "three billion, five hundred twenty-one million, five thousand, two hundred twenty-one".