3220306505 has 16 divisors (see below), whose sum is σ = 4295875584. Its totient is φ = 2301359040.

The previous prime is 3220306499. The next prime is 3220306517. The reversal of 3220306505 is 5056030223.

It is not a de Polignac number, because 3220306505 - 2¹⁰ = 3220305481 is a prime.

It is a super-2 number, since 2×3220306505² = 20740747972290630050, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 797069 + ... + 801098.

It is an arithmetic number, because the mean of its divisors is an integer number (268492224).

Almost surely, 2^3220306505 is an apocalyptic number.

It is an amenable number.

3220306505 is a deficient number, since it is larger than the sum of its proper divisors (1075569079).

3220306505 is a wasteful number, since it uses less digits than its factorization.

3220306505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1598216.

The product of its (nonzero) digits is 5400, while the sum is 26.

The square root of 3220306505 is about 56747.7444926228. The cubic root of 3220306505 is about 1476.7231043443.

Adding to 3220306505 its reverse (5056030223), we get a palindrome (8276336728).

The spelling of 3220306505 in words is "three billion, two hundred twenty million, three hundred six thousand, five hundred five".