8211640522 has 16 divisors (see below), whose sum is σ = 12744514440. Its totient is φ = 3963520512.

The previous prime is 8211640519. The next prime is 8211640523. The reversal of 8211640522 is 2250461128.

It can be written as a sum of positive squares in 4 ways, for example, as 7204784161 + 1006856361 = 84881^2 + 31731^2 .

It is not an unprimeable number, because it can be changed into a prime (8211640523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 454738 + ... + 472450.

Almost surely, 2^8211640522 is an apocalyptic number.

8211640522 is a deficient number, since it is larger than the sum of its proper divisors (4532873918).

8211640522 is a wasteful number, since it uses less digits than its factorization.

8211640522 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25737.

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 8211640522 is about 90618.1026175234. The cubic root of 8211640522 is about 2017.4834296632.

The spelling of 8211640522 in words is "eight billion, two hundred eleven million, six hundred forty thousand, five hundred twenty-two".