3218513 has 8 divisors (see below), whose sum is σ = 3394560. Its totient is φ = 3048420.

The previous prime is 3218503. The next prime is 3218533. The reversal of 3218513 is 3158123.

It is not a de Polignac number, because 3218513 - 2¹² = 3214417 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3218503) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68456 + ... + 68502.

It is an arithmetic number, because the mean of its divisors is an integer number (424320).

Almost surely, 2^3218513 is an apocalyptic number.

It is an amenable number.

3218513 is a deficient number, since it is larger than the sum of its proper divisors (176047).

3218513 is an frugal number, since it uses more digits than its factorization.

3218513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172 (or 78 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 3218513 is about 1794.0214602953. The cubic root of 3218513 is about 147.6448906624.

It can be divided in two parts, 32 and 18513, that multiplied together give a triangular number (592416 = T₁₀₈₈).

The spelling of 3218513 in words is "three million, two hundred eighteen thousand, five hundred thirteen".