195228659 has 4 divisors (see below), whose sum is σ = 195257304. Its totient is φ = 195200016.

The previous prime is 195228641. The next prime is 195228661. The reversal of 195228659 is 956822591.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 956822591 = 101 ⋅9473491.

It is a cyclic number.

It is not a de Polignac number, because 195228659 - 2²⁰ = 194180083 is a prime.

It is a super-2 number, since 2×195228659² = 76228458589876562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195228619) 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, 2444 + ... + 19910.

It is an arithmetic number, because the mean of its divisors is an integer number (48814326).

Almost surely, 2^195228659 is an apocalyptic number.

195228659 is a deficient number, since it is larger than the sum of its proper divisors (28645).

195228659 is a wasteful number, since it uses less digits than its factorization.

195228659 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28644.

The product of its digits is 388800, while the sum is 47.

The square root of 195228659 is about 13972.4249505947. The cubic root of 195228659 is about 580.1155724904.

The spelling of 195228659 in words is "one hundred ninety-five million, two hundred twenty-eight thousand, six hundred fifty-nine".