8227782621 has 12 divisors (see below), whose sum is σ = 12583667772. Its totient is φ = 5162530176.

The previous prime is 8227782581. The next prime is 8227782679. The reversal of 8227782621 is 1262877228.

It can be written as a sum of positive squares in 2 ways, for example, as 7214633721 + 1013148900 = 84939^2 + 31830^2 .

It is not a de Polignac number, because 8227782621 - 2⁹ = 8227782109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8227782221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26888026 + ... + 26888331.

It is an arithmetic number, because the mean of its divisors is an integer number (1048638981).

Almost surely, 2^8227782621 is an apocalyptic number.

It is an amenable number.

8227782621 is a deficient number, since it is larger than the sum of its proper divisors (4355885151).

8227782621 is a wasteful number, since it uses less digits than its factorization.

8227782621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53776380 (or 53776377 counting only the distinct ones).

The product of its digits is 301056, while the sum is 45.

The square root of 8227782621 is about 90707.1255249553. The cubic root of 8227782621 is about 2018.8045258642.

The spelling of 8227782621 in words is "eight billion, two hundred twenty-seven million, seven hundred eighty-two thousand, six hundred twenty-one".