243212120 has 64 divisors (see below), whose sum is σ = 574801920. Its totient is φ = 92439424.

The previous prime is 243212117. The next prime is 243212159. The reversal of 243212120 is 21212342.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 152849 + ... + 154431.

It is an arithmetic number, because the mean of its divisors is an integer number (8981280).

Almost surely, 2^243212120 is an apocalyptic number.

243212120 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 243212120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287400960).

243212120 is an abundant number, since it is smaller than the sum of its proper divisors (331589800).

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

243212120 is a wasteful number, since it uses less digits than its factorization.

243212120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1784 (or 1780 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 243212120 is about 15595.2595361539. The cubic root of 243212120 is about 624.2066691613.

Adding to 243212120 its reverse (21212342), we get a palindrome (264424462).

The spelling of 243212120 in words is "two hundred forty-three million, two hundred twelve thousand, one hundred twenty".