243011552500 has 30 divisors (see below), whose sum is σ = 531417668474. Its totient is φ = 97204620000.

The previous prime is 243011552473. The next prime is 243011552543. The reversal of 243011552500 is 5255110342.

It can be written as a sum of positive squares in 5 ways, for example, as 102557500516 + 140454051984 = 320246^2 + 374772^2 .

It is a super-2 number, since 2×243011552500² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 48599811 + ... + 48604810.

Almost surely, 2^243011552500 is an apocalyptic number.

243011552500 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243011552500 is an abundant number, since it is smaller than the sum of its proper divisors (288406115974).

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

243011552500 is an equidigital number, since it uses as much as digits as its factorization.

243011552500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97204645 (or 97204628 counting only the distinct ones).

The product of its (nonzero) digits is 6000, while the sum is 28.

Adding to 243011552500 its reverse (5255110342), we get a palindrome (248266662842).

The spelling of 243011552500 in words is "two hundred forty-three billion, eleven million, five hundred fifty-two thousand, five hundred".