243431011 has 4 divisors (see below), whose sum is σ = 254014992. Its totient is φ = 232847032.

The previous prime is 243431009. The next prime is 243431051. The reversal of 243431011 is 110134342.

243431011 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.

It is not a de Polignac number, because 243431011 - 2¹ = 243431009 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 243431011.

It is not an unprimeable number, because it can be changed into a prime (243431051) 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, 5291956 + ... + 5292001.

It is an arithmetic number, because the mean of its divisors is an integer number (63503748).

Almost surely, 2^243431011 is an apocalyptic number.

243431011 is a deficient number, since it is larger than the sum of its proper divisors (10583981).

243431011 is a wasteful number, since it uses less digits than its factorization.

243431011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10583980.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 243431011 is about 15602.2758275836. The cubic root of 243431011 is about 624.3938750902.

Adding to 243431011 its reverse (110134342), we get a palindrome (353565353).

It can be divided in two parts, 2434310 and 11, that added together give a triangular number (2434321 = T₂₂₀₆).

The spelling of 243431011 in words is "two hundred forty-three million, four hundred thirty-one thousand, eleven".