2845472821 has 2 divisors, whose sum is σ = 2845472822. Its totient is φ = 2845472820.

The previous prime is 2845472809. The next prime is 2845472831. The reversal of 2845472821 is 1282745482.

2845472821 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1694227921 + 1151244900 = 41161^2 + 33930^2 .

It is a cyclic number.

It is not a de Polignac number, because 2845472821 - 2⁵ = 2845472789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2845472831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1422736410 + 1422736411.

It is an arithmetic number, because the mean of its divisors is an integer number (1422736411).

Almost surely, 2^2845472821 is an apocalyptic number.

It is an amenable number.

2845472821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2845472821 is an equidigital number, since it uses as much as digits as its factorization.

2845472821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 286720, while the sum is 43.

The square root of 2845472821 is about 53342.9734922979. The cubic root of 2845472821 is about 1417.0488237259.

The spelling of 2845472821 in words is "two billion, eight hundred forty-five million, four hundred seventy-two thousand, eight hundred twenty-one".