243643113 has 32 divisors (see below), whose sum is σ = 423678720. Its totient is φ = 135457920.

The previous prime is 243643093. The next prime is 243643139. The reversal of 243643113 is 311346342.

243643113 is a `hidden beast` number, since 2 + 4 + 3 + 643 + 1 + 13 = 666.

It is not a de Polignac number, because 243643113 - 2¹² = 243639017 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243643313) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10428 + ... + 24413.

It is an arithmetic number, because the mean of its divisors is an integer number (13239960).

Almost surely, 2^243643113 is an apocalyptic number.

It is an amenable number.

243643113 is a deficient number, since it is larger than the sum of its proper divisors (180035607).

243643113 is a wasteful number, since it uses less digits than its factorization.

243643113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34894 (or 34888 counting only the distinct ones).

The product of its digits is 5184, while the sum is 27.

The square root of 243643113 is about 15609.0714970494. The cubic root of 243643113 is about 624.5751677202.

Adding to 243643113 its reverse (311346342), we get a palindrome (554989455).

The spelling of 243643113 in words is "two hundred forty-three million, six hundred forty-three thousand, one hundred thirteen".