3221713561 has 4 divisors (see below), whose sum is σ = 3514596624. Its totient is φ = 2928830500.

The previous prime is 3221713529. The next prime is 3221713577. The reversal of 3221713561 is 1653171223.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1653171223 = 11 ⋅150288293.

It is a cyclic number.

It is not a de Polignac number, because 3221713561 - 2⁵ = 3221713529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3221713591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 146441515 + ... + 146441536.

It is an arithmetic number, because the mean of its divisors is an integer number (878649156).

Almost surely, 2^3221713561 is an apocalyptic number.

It is an amenable number.

3221713561 is a deficient number, since it is larger than the sum of its proper divisors (292883063).

3221713561 is a wasteful number, since it uses less digits than its factorization.

3221713561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292883062.

The product of its digits is 7560, while the sum is 31.

The square root of 3221713561 is about 56760.1406006011. The cubic root of 3221713561 is about 1476.9381490458.

Adding to 3221713561 its reverse (1653171223), we get a palindrome (4874884784).

The spelling of 3221713561 in words is "three billion, two hundred twenty-one million, seven hundred thirteen thousand, five hundred sixty-one".