3213513521 has 4 divisors (see below), whose sum is σ = 3226847844. Its totient is φ = 3200179200.

The previous prime is 3213513493. The next prime is 3213513533. The reversal of 3213513521 is 1253153123.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1253153123 = 1301 ⋅963223.

It can be written as a sum of positive squares in 2 ways, for example, as 1678049296 + 1535464225 = 40964^2 + 39185^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3213513521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3213513571) 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 3 ways as a sum of consecutive naturals, for example, 6666800 + ... + 6667281.

It is an arithmetic number, because the mean of its divisors is an integer number (806711961).

Almost surely, 2^3213513521 is an apocalyptic number.

It is an amenable number.

3213513521 is a deficient number, since it is larger than the sum of its proper divisors (13334323).

3213513521 is a wasteful number, since it uses less digits than its factorization.

3213513521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13334322.

The product of its digits is 2700, while the sum is 26.

The square root of 3213513521 is about 56687.8604376634. The cubic root of 3213513521 is about 1475.6840295300.

Adding to 3213513521 its reverse (1253153123), we get a palindrome (4466666644).

The spelling of 3213513521 in words is "three billion, two hundred thirteen million, five hundred thirteen thousand, five hundred twenty-one".