195135881 has 8 divisors (see below), whose sum is σ = 197038080. Its totient is φ = 193239648.

The previous prime is 195135859. The next prime is 195135893. The reversal of 195135881 is 188531591.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195135881 - 2²² = 190941577 is a prime.

It is a super-2 number, since 2×195135881² = 76156024107292322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195135821) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 90245 + ... + 92381.

It is an arithmetic number, because the mean of its divisors is an integer number (24629760).

Almost surely, 2^195135881 is an apocalyptic number.

It is an amenable number.

195135881 is a deficient number, since it is larger than the sum of its proper divisors (1902199).

195135881 is a wasteful number, since it uses less digits than its factorization.

195135881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2983.

The product of its digits is 43200, while the sum is 41.

The square root of 195135881 is about 13969.1045167541. The cubic root of 195135881 is about 580.0236623323.

The spelling of 195135881 in words is "one hundred ninety-five million, one hundred thirty-five thousand, eight hundred eighty-one".