243202120 has 128 divisors (see below), whose sum is σ = 658886400. Its totient is φ = 79027200.

The previous prime is 243202117. The next prime is 243202129. The reversal of 243202120 is 21202342.

It is a junction number, because it is equal to n+sod(n) for n = 243202094 and 243202103.

It is not an unprimeable number, because it can be changed into a prime (243202129) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 495075 + ... + 495565.

It is an arithmetic number, because the mean of its divisors is an integer number (5147550).

Almost surely, 2^243202120 is an apocalyptic number.

243202120 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 243202120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329443200).

243202120 is an abundant number, since it is smaller than the sum of its proper divisors (415684280).

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

243202120 is a wasteful number, since it uses less digits than its factorization.

243202120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 599 (or 595 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 243202120 is about 15594.9389226120. The cubic root of 243202120 is about 624.1981140062.

Adding to 243202120 its reverse (21202342), we get a palindrome (264404462).

The spelling of 243202120 in words is "two hundred forty-three million, two hundred two thousand, one hundred twenty".