243421011 has 16 divisors (see below), whose sum is σ = 381837600. Its totient is φ = 152734464.

The previous prime is 243421007. The next prime is 243421043. The reversal of 243421011 is 110124342.

243421011 is a `hidden beast` number, since 243 + 421 + 0 + 1 + 1 = 666.

243421011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 243421011 - 2² = 243421007 is a prime.

It is not an unprimeable number, because it can be changed into a prime (243421001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 264706 + ... + 265623.

It is an arithmetic number, because the mean of its divisors is an integer number (23864850).

Almost surely, 2^243421011 is an apocalyptic number.

243421011 is a deficient number, since it is larger than the sum of its proper divisors (138416589).

243421011 is a wasteful number, since it uses less digits than its factorization.

243421011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 530355 (or 530349 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

The square root of 243421011 is about 15601.9553582235. The cubic root of 243421011 is about 624.3853250644.

Adding to 243421011 its reverse (110124342), we get a palindrome (353545353).

The spelling of 243421011 in words is "two hundred forty-three million, four hundred twenty-one thousand, eleven".