3221536897 has 4 divisors (see below), whose sum is σ = 3243158100. Its totient is φ = 3199915696.

The previous prime is 3221536867. The next prime is 3221536931. The reversal of 3221536897 is 7986351223.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7986351223 = 31 ⋅257624233.

It can be written as a sum of positive squares in 2 ways, for example, as 437813776 + 2783723121 = 20924^2 + 52761^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221536897 - 2¹⁹ = 3221012609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221536807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10810378 + ... + 10810675.

It is an arithmetic number, because the mean of its divisors is an integer number (810789525).

Almost surely, 2^3221536897 is an apocalyptic number.

It is an amenable number.

3221536897 is a deficient number, since it is larger than the sum of its proper divisors (21621203).

3221536897 is a wasteful number, since it uses less digits than its factorization.

3221536897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21621202.

The product of its digits is 544320, while the sum is 46.

The square root of 3221536897 is about 56758.5843463348. The cubic root of 3221536897 is about 1476.9111523803.

The spelling of 3221536897 in words is "three billion, two hundred twenty-one million, five hundred thirty-six thousand, eight hundred ninety-seven".