8381525 has 6 divisors (see below), whose sum is σ = 10393122. Its totient is φ = 6705200.

The previous prime is 8381497. The next prime is 8381531. The reversal of 8381525 is 5251838.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 857476 + 7524049 = 926^2 + 2743^2 .

It is a de Polignac number, because none of the positive numbers 2^k-8381525 is a prime.

It is a super-2 number, since 2×8381525² = 140499922651250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 8381491 and 8381500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 167606 + ... + 167655.

It is an arithmetic number, because the mean of its divisors is an integer number (1732187).

Almost surely, 2^8381525 is an apocalyptic number.

It is an amenable number.

8381525 is a deficient number, since it is larger than the sum of its proper divisors (2011597).

8381525 is a wasteful number, since it uses less digits than its factorization.

8381525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335271 (or 335266 counting only the distinct ones).

The product of its digits is 9600, while the sum is 32.

The square root of 8381525 is about 2895.0863544979. The cubic root of 8381525 is about 203.1301308369.

The spelling of 8381525 in words is "eight million, three hundred eighty-one thousand, five hundred twenty-five".