243541320 has 128 divisors (see below), whose sum is σ = 844007040. Its totient is φ = 55562240.

The previous prime is 243541267. The next prime is 243541327. The reversal of 243541320 is 23145342.

It is a super-3 number, since 3×243541320³ (a number of 26 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (243541327) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17014 + ... + 27866.

It is an arithmetic number, because the mean of its divisors is an integer number (6593805).

Almost surely, 2^243541320 is an apocalyptic number.

243541320 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 243541320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (422003520).

243541320 is an abundant number, since it is smaller than the sum of its proper divisors (600465720).

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

243541320 is a wasteful number, since it uses less digits than its factorization.

243541320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10895 (or 10891 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 24.

The square root of 243541320 is about 15605.8104563653. The cubic root of 243541320 is about 624.4881740358.

Adding to 243541320 its reverse (23145342), we get a palindrome (266686662).

The spelling of 243541320 in words is "two hundred forty-three million, five hundred forty-one thousand, three hundred twenty".