2573030821 has 4 divisors (see below), whose sum is σ = 2581304544. Its totient is φ = 2564757100.

The previous prime is 2573030773. The next prime is 2573030857. The reversal of 2573030821 is 1280303752.

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.

It is a cyclic number.

It is not a de Polignac number, because 2573030821 - 2⁷ = 2573030693 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2573030221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4136395 + ... + 4137016.

It is an arithmetic number, because the mean of its divisors is an integer number (645326136).

Almost surely, 2^2573030821 is an apocalyptic number.

It is an amenable number.

2573030821 is a deficient number, since it is larger than the sum of its proper divisors (8273723).

2573030821 is an equidigital number, since it uses as much as digits as its factorization.

2573030821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8273722.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 2573030821 is about 50725.0512173226. The cubic root of 2573030821 is about 1370.2979125514.

The spelling of 2573030821 in words is "two billion, five hundred seventy-three million, thirty thousand, eight hundred twenty-one".