2816513 has 4 divisors (see below), whose sum is σ = 3218880. Its totient is φ = 2414148.

The previous prime is 2816507. The next prime is 2816519. The reversal of 2816513 is 3156182.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3156182 = 2 ⋅1578091.

It is an interprime number because it is at equal distance from previous prime (2816507) and next prime (2816519).

It is a cyclic number.

It is not a de Polignac number, because 2816513 - 2²⁰ = 1767937 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2816519) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201173 + ... + 201186.

It is an arithmetic number, because the mean of its divisors is an integer number (804720).

2^2816513 is an apocalyptic number.

It is an amenable number.

2816513 is a deficient number, since it is larger than the sum of its proper divisors (402367).

2816513 is an equidigital number, since it uses as much as digits as its factorization.

2816513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402366.

The product of its digits is 1440, while the sum is 26.

The square root of 2816513 is about 1678.2470020828. The cubic root of 2816513 is about 141.2225080282. Note that the first 3 decimals are identical.

The spelling of 2816513 in words is "two million, eight hundred sixteen thousand, five hundred thirteen".