243155051442 has 16 divisors (see below), whose sum is σ = 540344558880. Its totient is φ = 81051683796.

The previous prime is 243155051429. The next prime is 243155051443. The reversal of 243155051442 is 244150551342.

243155051442 is a `hidden beast` number, since 2 + 4 + 3 + 1 + 5 + 505 + 144 + 2 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 243155051397 and 243155051406.

It is not an unprimeable number, because it can be changed into a prime (243155051443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2251435608 + ... + 2251435715.

It is an arithmetic number, because the mean of its divisors is an integer number (33771534930).

Almost surely, 2^243155051442 is an apocalyptic number.

243155051442 is an abundant number, since it is smaller than the sum of its proper divisors (297189507438).

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

243155051442 is a wasteful number, since it uses less digits than its factorization.

243155051442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4502871334 (or 4502871328 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 36.

The spelling of 243155051442 in words is "two hundred forty-three billion, one hundred fifty-five million, fifty-one thousand, four hundred forty-two".