2816531 has 2 divisors, whose sum is σ = 2816532. Its totient is φ = 2816530.

The previous prime is 2816519. The next prime is 2816533. The reversal of 2816531 is 1356182.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2816531 - 2¹⁰ = 2815507 is a prime.

It is a super-2 number, since 2×2816531² = 15865693747922, which contains 22 as substring.

Together with 2816533, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2816531.

It is not a weakly prime, because it can be changed into another prime (2816533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1408265 + 1408266.

It is an arithmetic number, because the mean of its divisors is an integer number (1408266).

2^2816531 is an apocalyptic number.

2816531 is a deficient number, since it is larger than the sum of its proper divisors (1).

2816531 is an equidigital number, since it uses as much as digits as its factorization.

2816531 is an evil number, because the sum of its binary digits is even.

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

The square root of 2816531 is about 1678.2523648129. The cubic root of 2816531 is about 141.2228088730. Note that the first 3 decimals are identical.

The spelling of 2816531 in words is "two million, eight hundred sixteen thousand, five hundred thirty-one".