8218525 has 18 divisors (see below), whose sum is σ = 11856570. Its totient is φ = 5634720.

The previous prime is 8218499. The next prime is 8218537. The reversal of 8218525 is 5258128.

It can be written as a sum of positive squares in 3 ways, for example, as 879844 + 7338681 = 938^2 + 2709^2 .

It is not a de Polignac number, because 8218525 - 2¹¹ = 8216477 is a prime.

8218525 is a lucky number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2130 + ... + 4579.

Almost surely, 2^8218525 is an apocalyptic number.

It is an amenable number.

8218525 is a deficient number, since it is larger than the sum of its proper divisors (3638045).

8218525 is a wasteful number, since it uses less digits than its factorization.

8218525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6733 (or 6721 counting only the distinct ones).

The product of its digits is 6400, while the sum is 31.

The square root of 8218525 is about 2866.7969931615. The cubic root of 8218525 is about 201.8047078325.

The spelling of 8218525 in words is "eight million, two hundred eighteen thousand, five hundred twenty-five".