243155213100 has 216 divisors, whose sum is σ = 766890204080. Its totient is φ = 64440023040.

The previous prime is 243155213087. The next prime is 243155213111. The reversal of 243155213100 is 1312551342.

243155213100 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 552 + 1 + 3 + 100 = 666.

243155213100 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×243155213100² (a number of 24 digits) contains 22 as substring.

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 71 ways as a sum of consecutive naturals, for example, 116396856 + ... + 116398944.

Almost surely, 2^243155213100 is an apocalyptic number.

243155213100 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 243155213100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (383445102040).

243155213100 is an abundant number, since it is smaller than the sum of its proper divisors (523734990980).

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

243155213100 is a wasteful number, since it uses less digits than its factorization.

243155213100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2849 (or 2839 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

Adding to 243155213100 its reverse (1312551342), we get a palindrome (244467764442).

The spelling of 243155213100 in words is "two hundred forty-three billion, one hundred fifty-five million, two hundred thirteen thousand, one hundred".