8571982225 has 9 divisors (see below), whose sum is σ = 10629832017. Its totient is φ = 6857215440.

The previous prime is 8571982219. The next prime is 8571982229. The reversal of 8571982225 is 5222891758.

The square root of 8571982225 is 92585.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 1116695889 + 7455286336 = 33417^2 + 86344^2 .

It is not a de Polignac number, because 8571982225 - 2¹⁷ = 8571851153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8571982229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 453667 + ... + 472183.

Almost surely, 2^8571982225 is an apocalyptic number.

8571982225 is the 92585-th square number.

8571982225 is the 46293-rd centered octagonal number.

It is an amenable number.

8571982225 is a deficient number, since it is larger than the sum of its proper divisors (2057849792).

8571982225 is an frugal number, since it uses more digits than its factorization.

8571982225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37044 (or 18522 counting only the distinct ones).

The product of its digits is 806400, while the sum is 49.

The cubic root of 8571982225 is about 2046.5722789811.

Multiplying 8571982225 by its sum of digits (49), we get a square (420027129025 = 648095²).

The spelling of 8571982225 in words is "eight billion, five hundred seventy-one million, nine hundred eighty-two thousand, two hundred twenty-five".