243343322240 has 64 divisors (see below), whose sum is σ = 581854122360. Its totient is φ = 97318674432.

The previous prime is 243343322231. The next prime is 243343322297. The reversal of 243343322240 is 42223343342.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 149496675904 + 93846646336 = 386648^2 + 306344^2 .

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 243343322197 and 243343322206.

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, 3586874 + ... + 3654086.

Almost surely, 2^243343322240 is an apocalyptic number.

243343322240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243343322240 is an abundant number, since it is smaller than the sum of its proper divisors (338510800120).

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

243343322240 is an equidigital number, since it uses as much as digits as its factorization.

243343322240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72889 (or 72877 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 32.

Adding to 243343322240 its reverse (42223343342), we get a palindrome (285566665582).

The spelling of 243343322240 in words is "two hundred forty-three billion, three hundred forty-three million, three hundred twenty-two thousand, two hundred forty".