243135163 has 4 divisors (see below), whose sum is σ = 244493640. Its totient is φ = 241776688.

The previous prime is 243135157. The next prime is 243135181. The reversal of 243135163 is 361531342.

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 243135163 - 2⁹ = 243134651 is a prime.

It is a super-2 number, since 2×243135163² = 118229414974073138, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243135143) 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, 678970 + ... + 679327.

It is an arithmetic number, because the mean of its divisors is an integer number (61123410).

Almost surely, 2^243135163 is an apocalyptic number.

243135163 is a deficient number, since it is larger than the sum of its proper divisors (1358477).

243135163 is a wasteful number, since it uses less digits than its factorization.

243135163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358476.

The product of its digits is 6480, while the sum is 28.

The square root of 243135163 is about 15592.7920206742. The cubic root of 243135163 is about 624.1408252111.

The spelling of 243135163 in words is "two hundred forty-three million, one hundred thirty-five thousand, one hundred sixty-three".