3521663321 has 8 divisors (see below), whose sum is σ = 3931159584. Its totient is φ = 3127057920.

The previous prime is 3521663317. The next prime is 3521663323. The reversal of 3521663321 is 1233661253.

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 3521663321 - 2² = 3521663317 is a prime.

It is a super-2 number, since 2×3521663321² = 24804225092953498082, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3521663323) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3722216 + ... + 3723161.

It is an arithmetic number, because the mean of its divisors is an integer number (491394948).

Almost surely, 2^3521663321 is an apocalyptic number.

It is an amenable number.

3521663321 is a deficient number, since it is larger than the sum of its proper divisors (409496263).

3521663321 is a wasteful number, since it uses less digits than its factorization.

3521663321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7445431.

The product of its digits is 19440, while the sum is 32.

The square root of 3521663321 is about 59343.6038760708. The cubic root of 3521663321 is about 1521.4205500094.

The spelling of 3521663321 in words is "three billion, five hundred twenty-one million, six hundred sixty-three thousand, three hundred twenty-one".