8265847821 has 32 divisors (see below), whose sum is σ = 13945740288. Its totient is φ = 4229850240.

The previous prime is 8265847813. The next prime is 8265847823. The reversal of 8265847821 is 1287485628.

8265847821 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 8265847821 - 2³ = 8265847813 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8265847823) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 251560 + ... + 282513.

It is an arithmetic number, because the mean of its divisors is an integer number (435804384).

Almost surely, 2^8265847821 is an apocalyptic number.

It is an amenable number.

8265847821 is a deficient number, since it is larger than the sum of its proper divisors (5679892467).

8265847821 is a wasteful number, since it uses less digits than its factorization.

8265847821 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534161.

The product of its digits is 1720320, while the sum is 51.

The square root of 8265847821 is about 90916.7081509224. The cubic root of 8265847821 is about 2021.9130180532.

It can be divided in two parts, 8265 and 847821, that added together give a triangular number (856086 = T₁₃₀₈).

The spelling of 8265847821 in words is "eight billion, two hundred sixty-five million, eight hundred forty-seven thousand, eight hundred twenty-one".