3221235521 has 8 divisors (see below), whose sum is σ = 3717862464. Its totient is φ = 2733721200.

The previous prime is 3221235499. The next prime is 3221235529. The reversal of 3221235521 is 1255321223.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-3221235521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221235529) 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, 2277395 + ... + 2278808.

It is an arithmetic number, because the mean of its divisors is an integer number (464732808).

Almost surely, 2^3221235521 is an apocalyptic number.

It is an amenable number.

3221235521 is a deficient number, since it is larger than the sum of its proper divisors (496626943).

3221235521 is a wasteful number, since it uses less digits than its factorization.

3221235521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4556311.

The product of its digits is 3600, while the sum is 26.

The square root of 3221235521 is about 56755.9293906813. The cubic root of 3221235521 is about 1476.8650957443.

Adding to 3221235521 its reverse (1255321223), we get a palindrome (4476556744).

The spelling of 3221235521 in words is "three billion, two hundred twenty-one million, two hundred thirty-five thousand, five hundred twenty-one".