195961131 has 12 divisors (see below), whose sum is σ = 287280552. Its totient is φ = 128690496.

The previous prime is 195961123. The next prime is 195961141. The reversal of 195961131 is 131169591.

It is a happy number.

195961131 is a `hidden beast` number, since 1 + 9 + 5 + 9 + 611 + 31 = 666.

195961131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 195961131 - 2³ = 195961123 is a prime.

It is a super-2 number, since 2×195961131² = 76801529725598322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (195961121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 161886 + ... + 163091.

It is an arithmetic number, because the mean of its divisors is an integer number (23940046).

Almost surely, 2^195961131 is an apocalyptic number.

195961131 is a deficient number, since it is larger than the sum of its proper divisors (91319421).

195961131 is a wasteful number, since it uses less digits than its factorization.

195961131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325050 (or 325047 counting only the distinct ones).

The product of its digits is 7290, while the sum is 36.

The square root of 195961131 is about 13998.6117525989. The cubic root of 195961131 is about 580.8401725708.

The spelling of 195961131 in words is "one hundred ninety-five million, nine hundred sixty-one thousand, one hundred thirty-one".