3213938545 has 16 divisors (see below), whose sum is σ = 3953669328. Its totient is φ = 2506613760.

The previous prime is 3213938531. The next prime is 3213938549. The reversal of 3213938545 is 5458393123.

It can be written as a sum of positive squares in 8 ways, for example, as 82864609 + 3131073936 = 9103^2 + 55956^2 .

It is not a de Polignac number, because 3213938545 - 2⁹ = 3213938033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3213938549) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 322477 + ... + 332293.

It is an arithmetic number, because the mean of its divisors is an integer number (247104333).

Almost surely, 2^3213938545 is an apocalyptic number.

It is an amenable number.

3213938545 is a deficient number, since it is larger than the sum of its proper divisors (739730783).

3213938545 is a wasteful number, since it uses less digits than its factorization.

3213938545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11460.

The product of its digits is 388800, while the sum is 43.

The square root of 3213938545 is about 56691.6091233967. The cubic root of 3213938545 is about 1475.7490853715.

The spelling of 3213938545 in words is "three billion, two hundred thirteen million, nine hundred thirty-eight thousand, five hundred forty-five".