195906081 has 16 divisors (see below), whose sum is σ = 308154368. Its totient is φ = 108334800.

The previous prime is 195906043. The next prime is 195906089. The reversal of 195906081 is 180609591.

It is not a de Polignac number, because 195906081 - 2¹⁴ = 195889697 is a prime.

It is a super-2 number, since 2×195906081² = 76758385145557122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195906089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149815 + ... + 151116.

It is an arithmetic number, because the mean of its divisors is an integer number (19259648).

Almost surely, 2^195906081 is an apocalyptic number.

It is an amenable number.

195906081 is a deficient number, since it is larger than the sum of its proper divisors (112248287).

195906081 is a wasteful number, since it uses less digits than its factorization.

195906081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300972.

The product of its (nonzero) digits is 19440, while the sum is 39.

The square root of 195906081 is about 13996.6453480825. The cubic root of 195906081 is about 580.7857770111.

The spelling of 195906081 in words is "one hundred ninety-five million, nine hundred six thousand, eighty-one".