8216525825 has 12 divisors (see below), whose sum is σ = 10189929648. Its totient is φ = 6572293200.

The previous prime is 8216525783. The next prime is 8216525857. The reversal of 8216525825 is 5285256128.

It is not a de Polignac number, because 8216525825 - 2¹⁶ = 8216460289 is a prime.

It is a super-2 number, since 2×8216525825² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 199454 + ... + 237096.

It is an arithmetic number, because the mean of its divisors is an integer number (849160804).

Almost surely, 2^8216525825 is an apocalyptic number.

It is an amenable number.

8216525825 is a deficient number, since it is larger than the sum of its proper divisors (1973403823).

8216525825 is a wasteful number, since it uses less digits than its factorization.

8216525825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46384 (or 46379 counting only the distinct ones).

The product of its digits is 384000, while the sum is 44.

The square root of 8216525825 is about 90645.0540570196. The cubic root of 8216525825 is about 2017.8834335334.

The spelling of 8216525825 in words is "eight billion, two hundred sixteen million, five hundred twenty-five thousand, eight hundred twenty-five".