243220120 has 128 divisors (see below), whose sum is σ = 650825280. Its totient is φ = 80640000.

The previous prime is 243220099. The next prime is 243220189. The reversal of 243220120 is 21022342.

It is a junction number, because it is equal to n+sod(n) for n = 243220094 and 243220103.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 577510 + ... + 577930.

Almost surely, 2^243220120 is an apocalyptic number.

243220120 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 243220120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325412640).

243220120 is an abundant number, since it is smaller than the sum of its proper divisors (407605160).

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

243220120 is a wasteful number, since it uses less digits than its factorization.

243220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 557 (or 553 counting only the distinct ones).

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

The square root of 243220120 is about 15595.5160222418. The cubic root of 243220120 is about 624.2135131166.

Adding to 243220120 its reverse (21022342), we get a palindrome (264242462).

The spelling of 243220120 in words is "two hundred forty-three million, two hundred twenty thousand, one hundred twenty".