243115021242 has 32 divisors (see below), whose sum is σ = 542408045760. Its totient is φ = 80715474000.

The previous prime is 243115021159. The next prime is 243115021243. The reversal of 243115021242 is 242120511342.

243115021242 is a `hidden beast` number, since 2 + 4 + 31 + 1 + 502 + 124 + 2 = 666.

It is a super-2 number, since 2×243115021242² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (243115021243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8954833 + ... + 8981940.

It is an arithmetic number, because the mean of its divisors is an integer number (16950251430).

Almost surely, 2^243115021242 is an apocalyptic number.

243115021242 is an abundant number, since it is smaller than the sum of its proper divisors (299293024518).

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

243115021242 is a wasteful number, since it uses less digits than its factorization.

243115021242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17937035 (or 17937029 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 27.

Adding to 243115021242 its reverse (242120511342), we get a palindrome (485235532584).

The spelling of 243115021242 in words is "two hundred forty-three billion, one hundred fifteen million, twenty-one thousand, two hundred forty-two".