8195521 has 4 divisors (see below), whose sum is σ = 8551872. Its totient is φ = 7839172.

The previous prime is 8195497. The next prime is 8195527. The reversal of 8195521 is 1255918.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 8195521 - 2⁵ = 8195489 is a prime.

It is a super-2 number, since 2×8195521² = 134333128922882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8195527) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 178141 + ... + 178186.

It is an arithmetic number, because the mean of its divisors is an integer number (2137968).

Almost surely, 2^8195521 is an apocalyptic number.

It is an amenable number.

8195521 is a deficient number, since it is larger than the sum of its proper divisors (356351).

8195521 is a wasteful number, since it uses less digits than its factorization.

8195521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356350.

The product of its digits is 3600, while the sum is 31.

The square root of 8195521 is about 2862.7820385073. The cubic root of 8195521 is about 201.6162452397.

The spelling of 8195521 in words is "eight million, one hundred ninety-five thousand, five hundred twenty-one".