243235052511 has 16 divisors (see below), whose sum is σ = 372417306240. Its totient is φ = 139656489120.

The previous prime is 243235052509. The next prime is 243235052519. The reversal of 243235052511 is 115250532342.

It is not a de Polignac number, because 243235052511 - 2¹ = 243235052509 is a prime.

It is a super-4 number, since 4×243235052511⁴ (a number of 47 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243235052519) 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, 193966720 + ... + 193967973.

It is an arithmetic number, because the mean of its divisors is an integer number (23276081640).

Almost surely, 2^243235052511 is an apocalyptic number.

243235052511 is a deficient number, since it is larger than the sum of its proper divisors (129182253729).

243235052511 is a wasteful number, since it uses less digits than its factorization.

243235052511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 387934726.

The product of its (nonzero) digits is 36000, while the sum is 33.

Adding to 243235052511 its reverse (115250532342), we get a palindrome (358485584853).

The spelling of 243235052511 in words is "two hundred forty-three billion, two hundred thirty-five million, fifty-two thousand, five hundred eleven".