195131 has 2 divisors, whose sum is σ = 195132. Its totient is φ = 195130.

The previous prime is 195127. The next prime is 195137. The reversal of 195131 is 131591.

It is a weak prime.

It is an emirp because it is prime and its reverse (131591) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 195131 - 2² = 195127 is a prime.

It is a super-2 number, since 2×195131² = 76152214322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (195137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97565 + 97566.

It is an arithmetic number, because the mean of its divisors is an integer number (97566).

2¹⁹⁵¹³¹ is an apocalyptic number.

195131 is a deficient number, since it is larger than the sum of its proper divisors (1).

195131 is an equidigital number, since it uses as much as digits as its factorization.

195131 is an evil number, because the sum of its binary digits is even.

The product of its digits is 135, while the sum is 20.

The square root of 195131 is about 441.7363467047. The cubic root of 195131 is about 58.0018826182.

The spelling of 195131 in words is "one hundred ninety-five thousand, one hundred thirty-one".