243057195 has 24 divisors (see below), whose sum is σ = 423994896. Its totient is φ = 128801088.

The previous prime is 243057187. The next prime is 243057197. The reversal of 243057195 is 591750342.

It is not a de Polignac number, because 243057195 - 2³ = 243057187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243057197) 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, 10137 + ... + 24266.

It is an arithmetic number, because the mean of its divisors is an integer number (17666454).

Almost surely, 2^243057195 is an apocalyptic number.

243057195 is a deficient number, since it is larger than the sum of its proper divisors (180937701).

243057195 is a wasteful number, since it uses less digits than its factorization.

243057195 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34571 (or 34568 counting only the distinct ones).

The product of its (nonzero) digits is 37800, while the sum is 36.

The square root of 243057195 is about 15590.2916906644. The cubic root of 243057195 is about 624.0741020849.

The spelling of 243057195 in words is "two hundred forty-three million, fifty-seven thousand, one hundred ninety-five".