8195228257 has 4 divisors (see below), whose sum is σ = 8626556080. Its totient is φ = 7763900436.

The previous prime is 8195228243. The next prime is 8195228299. The reversal of 8195228257 is 7528225918.

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 a de Polignac number, because none of the positive numbers 2^k-8195228257 is a prime.

It is the 90528-th Hogben number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 8195228257.

It is not an unprimeable number, because it can be changed into a prime (8195228227) by changing a digit.

It is a nontrivial repunit in base 90527.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 215663883 + ... + 215663920.

It is an arithmetic number, because the mean of its divisors is an integer number (2156639020).

Almost surely, 2^8195228257 is an apocalyptic number.

It is an amenable number.

8195228257 is a deficient number, since it is larger than the sum of its proper divisors (431327823).

8195228257 is a wasteful number, since it uses less digits than its factorization.

8195228257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431327822.

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

The square root of 8195228257 is about 90527.5000041424. The cubic root of 8195228257 is about 2016.1384464195.

The spelling of 8195228257 in words is "eight billion, one hundred ninety-five million, two hundred twenty-eight thousand, two hundred fifty-seven".