243351535434 has 96 divisors (see below), whose sum is σ = 599717126016. Its totient is φ = 65411942400.

The previous prime is 243351535387. The next prime is 243351535447. The reversal of 243351535434 is 434535153342.

It is a super-3 number, since 3×243351535434³ (a number of 35 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13990707 + ... + 14008089.

It is an arithmetic number, because the mean of its divisors is an integer number (6247053396).

Almost surely, 2^243351535434 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243351535434, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (299858563008).

243351535434 is an abundant number, since it is smaller than the sum of its proper divisors (356365590582).

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

243351535434 is a wasteful number, since it uses less digits than its factorization.

243351535434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20220 (or 20213 counting only the distinct ones).

The product of its digits is 1296000, while the sum is 42.

Adding to 243351535434 its reverse (434535153342), we get a palindrome (677886688776).

The spelling of 243351535434 in words is "two hundred forty-three billion, three hundred fifty-one million, five hundred thirty-five thousand, four hundred thirty-four".