243213120 has 84 divisors (see below), whose sum is σ = 836561700. Its totient is φ = 64856064.

The previous prime is 243213119. The next prime is 243213121. The reversal of 243213120 is 21312342.

243213120 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243213119) and next prime (243213121).

It can be written as a sum of positive squares in 2 ways, for example, as 48108096 + 195105024 = 6936^2 + 13968^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 243213093 and 243213102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243213121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39345 + ... + 45104.

Almost surely, 2^243213120 is an apocalyptic number.

243213120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243213120 is an abundant number, since it is smaller than the sum of its proper divisors (593348580).

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

243213120 is a wasteful number, since it uses less digits than its factorization.

243213120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84472 (or 84459 counting only the distinct ones).

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

The square root of 243213120 is about 15595.2915971456. The cubic root of 243213120 is about 624.2075246639.

Adding to 243213120 its reverse (21312342), we get a palindrome (264525462).

The spelling of 243213120 in words is "two hundred forty-three million, two hundred thirteen thousand, one hundred twenty".