243420543135 has 192 divisors, whose sum is σ = 547187097600. Its totient is φ = 97145568000.

The previous prime is 243420543133. The next prime is 243420543137. The reversal of 243420543135 is 531345024342.

243420543135 is a `hidden beast` number, since 2 + 43 + 42 + 0 + 543 + 1 + 35 = 666.

It is an interprime number because it is at equal distance from previous prime (243420543133) and next prime (243420543137).

It is not a de Polignac number, because 243420543135 - 2¹ = 243420543133 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243420543135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243420543133) by changing a digit.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 14062716 + ... + 14080014.

It is an arithmetic number, because the mean of its divisors is an integer number (2849932800).

Almost surely, 2^243420543135 is an apocalyptic number.

243420543135 is an abundant number, since it is smaller than the sum of its proper divisors (303766554465).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

243420543135 is a wasteful number, since it uses less digits than its factorization.

243420543135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17490 (or 17487 counting only the distinct ones).

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

Adding to 243420543135 its reverse (531345024342), we get a palindrome (774765567477).

The spelling of 243420543135 in words is "two hundred forty-three billion, four hundred twenty million, five hundred forty-three thousand, one hundred thirty-five".