243865542 has 16 divisors (see below), whose sum is σ = 488900160. Its totient is φ = 81093672.

The previous prime is 243865541. The next prime is 243865543. The reversal of 243865542 is 245568342.

243865542 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (243865541) and next prime (243865543).

It is a self number, because there is not a number n which added to its sum of digits gives 243865542.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (243865541) 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, 45988 + ... + 51015.

It is an arithmetic number, because the mean of its divisors is an integer number (30556260).

Almost surely, 2^243865542 is an apocalyptic number.

243865542 is an abundant number, since it is smaller than the sum of its proper divisors (245034618).

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

243865542 is a wasteful number, since it uses less digits than its factorization.

243865542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 97427.

The product of its digits is 230400, while the sum is 39.

The square root of 243865542 is about 15616.1948630260. The cubic root of 243865542 is about 624.7651742887.

The spelling of 243865542 in words is "two hundred forty-three million, eight hundred sixty-five thousand, five hundred forty-two".