195955231 has 2 divisors, whose sum is σ = 195955232. Its totient is φ = 195955230.

The previous prime is 195955223. The next prime is 195955237. The reversal of 195955231 is 132559591.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 195955231 - 2³ = 195955223 is a prime.

It is a super-2 number, since 2×195955231² = 76796905112526722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (195955237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97977615 + 97977616.

It is an arithmetic number, because the mean of its divisors is an integer number (97977616).

Almost surely, 2^195955231 is an apocalyptic number.

195955231 is a deficient number, since it is larger than the sum of its proper divisors (1).

195955231 is an equidigital number, since it uses as much as digits as its factorization.

195955231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60750, while the sum is 40.

The square root of 195955231 is about 13998.4010158303. The cubic root of 195955231 is about 580.8343431981.

The spelling of 195955231 in words is "one hundred ninety-five million, nine hundred fifty-five thousand, two hundred thirty-one".