2805232621 has 2 divisors, whose sum is σ = 2805232622. Its totient is φ = 2805232620.

The previous prime is 2805232597. The next prime is 2805232627. The reversal of 2805232621 is 1262325082.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2723691721 + 81540900 = 52189^2 + 9030^2 .

It is a cyclic number.

It is not a de Polignac number, because 2805232621 - 2²¹ = 2803135469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2805232627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1402616310 + 1402616311.

It is an arithmetic number, because the mean of its divisors is an integer number (1402616311).

Almost surely, 2^2805232621 is an apocalyptic number.

It is an amenable number.

2805232621 is a deficient number, since it is larger than the sum of its proper divisors (1).

2805232621 is an equidigital number, since it uses as much as digits as its factorization.

2805232621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 2805232621 is about 52964.4467638434. The cubic root of 2805232621 is about 1410.3371963189.

The spelling of 2805232621 in words is "two billion, eight hundred five million, two hundred thirty-two thousand, six hundred twenty-one".