195481565 has 4 divisors (see below), whose sum is σ = 234577884. Its totient is φ = 156385248.

The previous prime is 195481549. The next prime is 195481597. The reversal of 195481565 is 565184591.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 565184591 = 31 ⋅18231761.

It can be written as a sum of positive squares in 2 ways, for example, as 93915481 + 101566084 = 9691^2 + 10078^2 .

It is a cyclic number.

It is not a de Polignac number, because 195481565 - 2⁴ = 195481549 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19548152 + ... + 19548161.

It is an arithmetic number, because the mean of its divisors is an integer number (58644471).

Almost surely, 2^195481565 is an apocalyptic number.

It is an amenable number.

195481565 is a deficient number, since it is larger than the sum of its proper divisors (39096319).

195481565 is an equidigital number, since it uses as much as digits as its factorization.

195481565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39096318.

The product of its digits is 216000, while the sum is 44.

The square root of 195481565 is about 13981.4722043138. The cubic root of 195481565 is about 580.3659650338.

The spelling of 195481565 in words is "one hundred ninety-five million, four hundred eighty-one thousand, five hundred sixty-five".