3218540805 has 64 divisors (see below), whose sum is σ = 5870880000. Its totient is φ = 1672310016.

The previous prime is 3218540803. The next prime is 3218540839. The reversal of 3218540805 is 5080458123.

It is a happy number.

3218540805 is a `hidden beast` number, since 32 + 1 + 8 + 540 + 80 + 5 = 666.

It is not a de Polignac number, because 3218540805 - 2¹ = 3218540803 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 3218540805.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3218540803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1064586 + ... + 1067604.

It is an arithmetic number, because the mean of its divisors is an integer number (91732500).

Almost surely, 2^3218540805 is an apocalyptic number.

It is an amenable number.

3218540805 is a deficient number, since it is larger than the sum of its proper divisors (2652339195).

3218540805 is a wasteful number, since it uses less digits than its factorization.

3218540805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3235 (or 3229 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 36.

The square root of 3218540805 is about 56732.1849129751. The cubic root of 3218540805 is about 1476.4531583331.

Adding to 3218540805 its reverse (5080458123), we get a palindrome (8298998928).

The spelling of 3218540805 in words is "three billion, two hundred eighteen million, five hundred forty thousand, eight hundred five".