2823521 has 2 divisors, whose sum is σ = 2823522. Its totient is φ = 2823520.

The previous prime is 2823517. The next prime is 2823523. The reversal of 2823521 is 1253282.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2608225 + 215296 = 1615^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 2823521 - 2² = 2823517 is a prime.

Together with 2823523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2823523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1411760 + 1411761.

It is an arithmetic number, because the mean of its divisors is an integer number (1411761).

2^2823521 is an apocalyptic number.

It is an amenable number.

2823521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2823521 is an equidigital number, since it uses as much as digits as its factorization.

2823521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 960, while the sum is 23.

The square root of 2823521 is about 1680.3335978311. Note that the first 3 decimals coincide. The cubic root of 2823521 is about 141.3395401679.

The spelling of 2823521 in words is "two million, eight hundred twenty-three thousand, five hundred twenty-one".