243323015222440 has 64 divisors (see below), whose sum is σ = 551824061644800. Its totient is φ = 96556457991168.

The previous prime is 243323015222437. The next prime is 243323015222461. The reversal of 243323015222440 is 44222510323342.

243323015222440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 243323015222440.

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, 75728521 + ... + 78876199.

It is an arithmetic number, because the mean of its divisors is an integer number (8622250963200).

Almost surely, 2^{243323015222440} is an apocalyptic number.

243323015222440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243323015222440 is an abundant number, since it is smaller than the sum of its proper divisors (308501046422360).

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

243323015222440 is a wasteful number, since it uses less digits than its factorization.

243323015222440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3163034 (or 3163030 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 37.

Adding to 243323015222440 its reverse (44222510323342), we get a palindrome (287545525545782).

The spelling of 243323015222440 in words is "two hundred forty-three trillion, three hundred twenty-three billion, fifteen million, two hundred twenty-two thousand, four hundred forty".