243102320100 has 216 divisors, whose sum is σ = 776610918720. Its totient is φ = 63595319040.

The previous prime is 243102320099. The next prime is 243102320129. The reversal of 243102320100 is 1023201342.

243102320100 is a `hidden beast` number, since 2 + 431 + 0 + 232 + 0 + 1 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 9906646 + ... + 9931154.

It is an arithmetic number, because the mean of its divisors is an integer number (3595420920).

Almost surely, 2^243102320100 is an apocalyptic number.

243102320100 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 243102320100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (388305459360).

243102320100 is an abundant number, since it is smaller than the sum of its proper divisors (533508598620).

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

243102320100 is a wasteful number, since it uses less digits than its factorization.

243102320100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24739 (or 24729 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 243102320100 its reverse (1023201342), we get a palindrome (244125521442).

The spelling of 243102320100 in words is "two hundred forty-three billion, one hundred two million, three hundred twenty thousand, one hundred".