852227821 has 4 divisors (see below), whose sum is σ = 856936444. Its totient is φ = 847519200.

The previous prime is 852227819. The next prime is 852227837. The reversal of 852227821 is 128722258.

It is a happy number.

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 57608100 + 794619721 = 7590^2 + 28189^2 .

It is a cyclic number.

It is not a de Polignac number, because 852227821 - 2¹ = 852227819 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 (852227861) 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, 2354040 + ... + 2354401.

It is an arithmetic number, because the mean of its divisors is an integer number (214234111).

Almost surely, 2^852227821 is an apocalyptic number.

It is an amenable number.

852227821 is a deficient number, since it is larger than the sum of its proper divisors (4708623).

852227821 is a wasteful number, since it uses less digits than its factorization.

852227821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4708622.

The product of its digits is 35840, while the sum is 37.

The square root of 852227821 is about 29192.9412872359. The cubic root of 852227821 is about 948.0951011224.

The spelling of 852227821 in words is "eight hundred fifty-two million, two hundred twenty-seven thousand, eight hundred twenty-one".