3221206525 has 12 divisors (see below), whose sum is σ = 4001118912. Its totient is φ = 2572563440.

The previous prime is 3221206481. The next prime is 3221206579. The reversal of 3221206525 is 5256021223.

It is not a de Polignac number, because 3221206525 - 2⁷ = 3221206397 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3221206493 and 3221206502.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 95077 + ... + 124426.

It is an arithmetic number, because the mean of its divisors is an integer number (333426576).

Almost surely, 2^3221206525 is an apocalyptic number.

It is an amenable number.

3221206525 is a deficient number, since it is larger than the sum of its proper divisors (779912387).

3221206525 is a wasteful number, since it uses less digits than its factorization.

3221206525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220100 (or 220095 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 3221206525 is about 56755.6739454303. The cubic root of 3221206525 is about 1476.8606643899.

Adding to 3221206525 its reverse (5256021223), we get a palindrome (8477227748).

The spelling of 3221206525 in words is "three billion, two hundred twenty-one million, two hundred six thousand, five hundred twenty-five".