3823057775221 has 4 divisors (see below), whose sum is σ = 3828003516972. Its totient is φ = 3818112033472.

The previous prime is 3823057775219. The next prime is 3823057775227. The reversal of 3823057775221 is 1225777503283.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2142962220996 + 1680095554225 = 1463886^2 + 1296185^2 .

It is a cyclic number.

It is not a de Polignac number, because 3823057775221 - 2¹ = 3823057775219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3823057775227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2472869716 + ... + 2472871261.

It is an arithmetic number, because the mean of its divisors is an integer number (957000879243).

Almost surely, 2^{3823057775221} is an apocalyptic number.

It is an amenable number.

3823057775221 is a deficient number, since it is larger than the sum of its proper divisors (4945741751).

3823057775221 is an equidigital number, since it uses as much as digits as its factorization.

3823057775221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4945741750.

The product of its (nonzero) digits is 4939200, while the sum is 52.

The spelling of 3823057775221 in words is "three trillion, eight hundred twenty-three billion, fifty-seven million, seven hundred seventy-five thousand, two hundred twenty-one".