243322420 has 48 divisors (see below), whose sum is σ = 558835200. Its totient is φ = 88257920.

The previous prime is 243322399. The next prime is 243322427. The reversal of 243322420 is 24223342.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 243322391 and 243322400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243322427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104226 + ... + 106534.

It is an arithmetic number, because the mean of its divisors is an integer number (11642400).

Almost surely, 2^243322420 is an apocalyptic number.

243322420 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 243322420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279417600).

243322420 is an abundant number, since it is smaller than the sum of its proper divisors (315512780).

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

243322420 is a wasteful number, since it uses less digits than its factorization.

243322420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2808 (or 2806 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 22.

The square root of 243322420 is about 15598.7954663173. The cubic root of 243322420 is about 624.3010169678.

Adding to 243322420 its reverse (24223342), we get a palindrome (267545762).

The spelling of 243322420 in words is "two hundred forty-three million, three hundred twenty-two thousand, four hundred twenty".