243245615121 has 24 divisors (see below), whose sum is σ = 360088694784. Its totient is φ = 158136315840.

The previous prime is 243245615113. The next prime is 243245615131. The reversal of 243245615121 is 121516542342.

243245615121 is a `hidden beast` number, since 2 + 4 + 3 + 24 + 5 + 615 + 12 + 1 = 666.

It is not a de Polignac number, because 243245615121 - 2³ = 243245615113 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (243245615131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 665040 + ... + 963726.

It is an arithmetic number, because the mean of its divisors is an integer number (15003695616).

Almost surely, 2^243245615121 is an apocalyptic number.

It is an amenable number.

243245615121 is a deficient number, since it is larger than the sum of its proper divisors (116843079663).

243245615121 is a wasteful number, since it uses less digits than its factorization.

243245615121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300941 (or 300938 counting only the distinct ones).

The product of its digits is 57600, while the sum is 36.

The spelling of 243245615121 in words is "two hundred forty-three billion, two hundred forty-five million, six hundred fifteen thousand, one hundred twenty-one".