3212506405 has 16 divisors (see below), whose sum is σ = 4084750080. Its totient is φ = 2417064192.

The previous prime is 3212506403. The next prime is 3212506411. The reversal of 3212506405 is 5046052123.

It is a cyclic number.

It is not a de Polignac number, because 3212506405 - 2¹ = 3212506403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3212506403) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 109936 + ... + 136054.

It is an arithmetic number, because the mean of its divisors is an integer number (255296880).

Almost surely, 2^3212506405 is an apocalyptic number.

It is an amenable number.

3212506405 is a deficient number, since it is larger than the sum of its proper divisors (872243675).

3212506405 is a wasteful number, since it uses less digits than its factorization.

3212506405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27588.

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

The square root of 3212506405 is about 56678.9767462328. The cubic root of 3212506405 is about 1475.5298534989.

Adding to 3212506405 its reverse (5046052123), we get a palindrome (8258558528).

The spelling of 3212506405 in words is "three billion, two hundred twelve million, five hundred six thousand, four hundred five".