3220307505 has 24 divisors (see below), whose sum is σ = 5584505472. Its totient is φ = 1716685344.

The previous prime is 3220307471. The next prime is 3220307509. The reversal of 3220307505 is 5057030223.

It is not a de Polignac number, because 3220307505 - 2²⁰ = 3219258929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (3220307509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 86232 + ... + 117798.

It is an arithmetic number, because the mean of its divisors is an integer number (232687728).

Almost surely, 2^3220307505 is an apocalyptic number.

It is an amenable number.

3220307505 is a deficient number, since it is larger than the sum of its proper divisors (2364197967).

3220307505 is a wasteful number, since it uses less digits than its factorization.

3220307505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33845 (or 33842 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 27.

The square root of 3220307505 is about 56747.7533035450. The cubic root of 3220307505 is about 1476.7232571996.

Adding to 3220307505 its reverse (5057030223), we get a palindrome (8277337728).

The spelling of 3220307505 in words is "three billion, two hundred twenty million, three hundred seven thousand, five hundred five".