3221125345 has 4 divisors (see below), whose sum is σ = 3865350420. Its totient is φ = 2576900272.

The previous prime is 3221125301. The next prime is 3221125351. The reversal of 3221125345 is 5435211223.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1446356961 + 1774768384 = 38031^2 + 42128^2 .

It is a cyclic number.

It is not a de Polignac number, because 3221125345 - 2⁹ = 3221124833 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322112530 + ... + 322112539.

It is an arithmetic number, because the mean of its divisors is an integer number (966337605).

Almost surely, 2^3221125345 is an apocalyptic number.

It is an amenable number.

3221125345 is a deficient number, since it is larger than the sum of its proper divisors (644225075).

3221125345 is an equidigital number, since it uses as much as digits as its factorization.

3221125345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644225074.

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

The square root of 3221125345 is about 56754.9587701374. The cubic root of 3221125345 is about 1476.8482578009.

Adding to 3221125345 its reverse (5435211223), we get a palindrome (8656336568).

The spelling of 3221125345 in words is "three billion, two hundred twenty-one million, one hundred twenty-five thousand, three hundred forty-five".