243155322500 has 120 divisors (see below), whose sum is σ = 547225531776. Its totient is φ = 94460080000.

The previous prime is 243155322457. The next prime is 243155322521. The reversal of 243155322500 is 5223551342.

243155322500 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

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 39 ways as a sum of consecutive naturals, for example, 15384602 + ... + 15400398.

Almost surely, 2^243155322500 is an apocalyptic number.

243155322500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 243155322500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (273612765888).

243155322500 is an abundant number, since it is smaller than the sum of its proper divisors (304070209276).

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

243155322500 is a wasteful number, since it uses less digits than its factorization.

243155322500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15999 (or 15982 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 243155322500 its reverse (5223551342), we get a palindrome (248378873842).

The spelling of 243155322500 in words is "two hundred forty-three billion, one hundred fifty-five million, three hundred twenty-two thousand, five hundred".