243315524240 has 20 divisors (see below), whose sum is σ = 565708594044. Its totient is φ = 97326209664.

The previous prime is 243315524227. The next prime is 243315524269. The reversal of 243315524240 is 42425513342.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32289214864 + 211026309376 = 179692^2 + 459376^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 243315524240.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1520721947 + ... + 1520722106.

Almost surely, 2^243315524240 is an apocalyptic number.

243315524240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

243315524240 is an abundant number, since it is smaller than the sum of its proper divisors (322393069804).

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

243315524240 is a wasteful number, since it uses less digits than its factorization.

243315524240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3041444066 (or 3041444060 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 35.

The spelling of 243315524240 in words is "two hundred forty-three billion, three hundred fifteen million, five hundred twenty-four thousand, two hundred forty".