243040224 has 96 divisors (see below), whose sum is σ = 731759616. Its totient is φ = 69189120.

The previous prime is 243040201. The next prime is 243040247. The reversal of 243040224 is 422040342.

It is an interprime number because it is at equal distance from previous prime (243040201) and next prime (243040247).

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a zygodrome in base 2.

It is a self number, because there is not a number n which added to its sum of digits gives 243040224.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 266329 + ... + 267239.

It is an arithmetic number, because the mean of its divisors is an integer number (7622496).

Almost surely, 2^243040224 is an apocalyptic number.

243040224 is a gapful number since it is divisible by the number (24) 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 243040224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (365879808).

243040224 is an abundant number, since it is smaller than the sum of its proper divisors (488719392).

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

243040224 is a wasteful number, since it uses less digits than its factorization.

243040224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1328 (or 1320 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 243040224 is about 15589.7474001345. The cubic root of 243040224 is about 624.0595768232.

Adding to 243040224 its reverse (422040342), we get a palindrome (665080566).

The spelling of 243040224 in words is "two hundred forty-three million, forty thousand, two hundred twenty-four".