243115525215 has 24 divisors (see below), whose sum is σ = 425491516320. Its totient is φ = 128402760384.

The previous prime is 243115525201. The next prime is 243115525249. The reversal of 243115525215 is 512525511342.

243115525215 is a `hidden beast` number, since 2 + 4 + 3 + 115 + 525 + 2 + 15 = 666.

It is not a de Polignac number, because 243115525215 - 2¹⁷ = 243115394143 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 243115525215.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26221420 + ... + 26230689.

It is an arithmetic number, because the mean of its divisors is an integer number (17728813180).

Almost surely, 2^243115525215 is an apocalyptic number.

243115525215 is a deficient number, since it is larger than the sum of its proper divisors (182375991105).

243115525215 is a wasteful number, since it uses less digits than its factorization.

243115525215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52452223 (or 52452220 counting only the distinct ones).

The product of its digits is 60000, while the sum is 36.

The spelling of 243115525215 in words is "two hundred forty-three billion, one hundred fifteen million, five hundred twenty-five thousand, two hundred fifteen".