243222320 has 40 divisors (see below), whose sum is σ = 616902480. Its totient is φ = 88444160.

The previous prime is 243222293. The next prime is 243222337. The reversal of 243222320 is 23222342.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 243222292 and 243222301.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 137315 + ... + 139074.

It is an arithmetic number, because the mean of its divisors is an integer number (15422562).

Almost surely, 2^243222320 is an apocalyptic number.

243222320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243222320 is an abundant number, since it is smaller than the sum of its proper divisors (373680160).

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

243222320 is a wasteful number, since it uses less digits than its factorization.

243222320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276413 (or 276407 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 243222320 is about 15595.5865551764. The cubic root of 243222320 is about 624.2153951779.

Adding to 243222320 its reverse (23222342), we get a palindrome (266444662).

The spelling of 243222320 in words is "two hundred forty-three million, two hundred twenty-two thousand, three hundred twenty".