243848161 has 4 divisors (see below), whose sum is σ = 245401492. Its totient is φ = 242294832.

The previous prime is 243848113. The next prime is 243848179. The reversal of 243848161 is 161848342.

243848161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 161848342 = 2 ⋅80924171.

It can be written as a sum of positive squares in 2 ways, for example, as 170145936 + 73702225 = 13044^2 + 8585^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-243848161 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 243848161.

It is not an unprimeable number, because it can be changed into a prime (243848191) 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, 776430 + ... + 776743.

It is an arithmetic number, because the mean of its divisors is an integer number (61350373).

Almost surely, 2^243848161 is an apocalyptic number.

It is an amenable number.

243848161 is a deficient number, since it is larger than the sum of its proper divisors (1553331).

243848161 is a wasteful number, since it uses less digits than its factorization.

243848161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1553330.

The product of its digits is 36864, while the sum is 37.

The square root of 243848161 is about 15615.6383475028. The cubic root of 243848161 is about 624.7503309979.

The spelling of 243848161 in words is "two hundred forty-three million, eight hundred forty-eight thousand, one hundred sixty-one".