195840243 has 24 divisors (see below), whose sum is σ = 287436240. Its totient is φ = 128471040.

The previous prime is 195840241. The next prime is 195840287. The reversal of 195840243 is 342048591.

It is not a de Polignac number, because 195840243 - 2¹ = 195840241 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 195840198 and 195840207.

It is not an unprimeable number, because it can be changed into a prime (195840241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 305203 + ... + 305843.

It is an arithmetic number, because the mean of its divisors is an integer number (11976510).

Almost surely, 2^195840243 is an apocalyptic number.

195840243 is a deficient number, since it is larger than the sum of its proper divisors (91595997).

195840243 is a wasteful number, since it uses less digits than its factorization.

195840243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1136 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 195840243 is about 13994.2932297419. The cubic root of 195840243 is about 580.7207083175.

The spelling of 195840243 in words is "one hundred ninety-five million, eight hundred forty thousand, two hundred forty-three".