243243155430 has 96 divisors (see below), whose sum is σ = 690464904480. Its totient is φ = 58921981440.

The previous prime is 243243155423. The next prime is 243243155557. The reversal of 243243155430 is 34551342342.

243243155430 is a `hidden beast` number, since 2 + 4 + 32 + 43 + 1 + 554 + 30 = 666.

It is a congruent number.

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, 1180804 + ... + 1371416.

It is an arithmetic number, because the mean of its divisors is an integer number (7192342755).

Almost surely, 2^243243155430 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243243155430, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (345232452240).

243243155430 is an abundant number, since it is smaller than the sum of its proper divisors (447221749050).

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

243243155430 is a wasteful number, since it uses less digits than its factorization.

243243155430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191926 (or 191923 counting only the distinct ones).

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

Adding to 243243155430 its reverse (34551342342), we get a palindrome (277794497772).

The spelling of 243243155430 in words is "two hundred forty-three billion, two hundred forty-three million, one hundred fifty-five thousand, four hundred thirty".