243042555511 has 8 divisors (see below), whose sum is σ = 277784912160. Its totient is φ = 208305696768.

The previous prime is 243042555463. The next prime is 243042555523. The reversal of 243042555511 is 115555240342.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 243042555511 - 2⁷ = 243042555383 is a prime.

It is a super-2 number, since 2×243042555511² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243042553511) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1279306 + ... + 1456951.

It is an arithmetic number, because the mean of its divisors is an integer number (34723114020).

Almost surely, 2^243042555511 is an apocalyptic number.

243042555511 is a deficient number, since it is larger than the sum of its proper divisors (34742356649).

243042555511 is a wasteful number, since it uses less digits than its factorization.

243042555511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2748953.

The product of its (nonzero) digits is 120000, while the sum is 37.

Adding to 243042555511 its reverse (115555240342), we get a palindrome (358597795853).

The spelling of 243042555511 in words is "two hundred forty-three billion, forty-two million, five hundred fifty-five thousand, five hundred eleven".