2522821 has 8 divisors (see below), whose sum is σ = 2893824. Its totient is φ = 2154480.

The previous prime is 2522813. The next prime is 2522827. The reversal of 2522821 is 1282252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2522821 - 2³ = 2522813 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2522792 and 2522801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2522827) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2211 + ... + 3151.

It is an arithmetic number, because the mean of its divisors is an integer number (361728).

2^2522821 is an apocalyptic number.

It is an amenable number.

2522821 is a deficient number, since it is larger than the sum of its proper divisors (371003).

2522821 is an equidigital number, since it uses as much as digits as its factorization.

2522821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1331.

The product of its digits is 640, while the sum is 22.

The square root of 2522821 is about 1588.3390695944. The cubic root of 2522821 is about 136.1326020703.

The spelling of 2522821 in words is "two million, five hundred twenty-two thousand, eight hundred twenty-one".