243243534051 has 24 divisors (see below), whose sum is σ = 401630427744. Its totient is φ = 138966693120.

The previous prime is 243243534031. The next prime is 243243534139. The reversal of 243243534051 is 150435342342.

243243534051 is a `hidden beast` number, since 2 + 4 + 3 + 243 + 5 + 3 + 405 + 1 = 666.

243243534051 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 243243534051 - 2⁵ = 243243534019 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 243243533997 and 243243534015.

It is not an unprimeable number, because it can be changed into a prime (243243534031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 111496 + ... + 706341.

It is an arithmetic number, because the mean of its divisors is an integer number (16734601156).

Almost surely, 2^243243534051 is an apocalyptic number.

243243534051 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

243243534051 is a deficient number, since it is larger than the sum of its proper divisors (158386893693).

243243534051 is a wasteful number, since it uses less digits than its factorization.

243243534051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 822571 (or 822568 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 36.

Adding to 243243534051 its reverse (150435342342), we get a palindrome (393678876393).

The spelling of 243243534051 in words is "two hundred forty-three billion, two hundred forty-three million, five hundred thirty-four thousand, fifty-one".