195447131 has 4 divisors (see below), whose sum is σ = 213215064. Its totient is φ = 177679200.

The previous prime is 195447121. The next prime is 195447179. The reversal of 195447131 is 131744591.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 195447131 - 2¹⁰ = 195446107 is a prime.

It is a super-2 number, since 2×195447131² = 76399162032262322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 195447091 and 195447100.

It is not an unprimeable number, because it can be changed into a prime (195447121) 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, 8883950 + ... + 8883971.

It is an arithmetic number, because the mean of its divisors is an integer number (53303766).

Almost surely, 2^195447131 is an apocalyptic number.

195447131 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

195447131 is a deficient number, since it is larger than the sum of its proper divisors (17767933).

195447131 is a wasteful number, since it uses less digits than its factorization.

195447131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17767932.

The product of its digits is 15120, while the sum is 35.

The square root of 195447131 is about 13980.2407346941. The cubic root of 195447131 is about 580.3318859546.

The spelling of 195447131 in words is "one hundred ninety-five million, four hundred forty-seven thousand, one hundred thirty-one".