243213542145 has 48 divisors (see below), whose sum is σ = 481829167872. Its totient is φ = 111175320960.

The previous prime is 243213542129. The next prime is 243213542171. The reversal of 243213542145 is 541245312342.

It is a happy number.

243213542145 is a `hidden beast` number, since 2 + 432 + 1 + 3 + 5 + 4 + 214 + 5 = 666.

It is not a de Polignac number, because 243213542145 - 2⁴ = 243213542129 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8308635 + ... + 8337855.

It is an arithmetic number, because the mean of its divisors is an integer number (10038107664).

Almost surely, 2^243213542145 is an apocalyptic number.

It is an amenable number.

243213542145 is a deficient number, since it is larger than the sum of its proper divisors (238615625727).

243213542145 is a wasteful number, since it uses less digits than its factorization.

243213542145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55662 (or 55659 counting only the distinct ones).

The product of its digits is 115200, while the sum is 36.

Adding to 243213542145 its reverse (541245312342), we get a palindrome (784458854487).

The spelling of 243213542145 in words is "two hundred forty-three billion, two hundred thirteen million, five hundred forty-two thousand, one hundred forty-five".