42544240243 has 4 divisors (see below), whose sum is σ = 44011283040. Its totient is φ = 41077197448.

The previous prime is 42544240237. The next prime is 42544240253. The reversal of 42544240243 is 34204244524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 42544240243 - 2¹³ = 42544232051 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42544240199 and 42544240208.

It is not an unprimeable number, because it can be changed into a prime (42544240253) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 733521355 + ... + 733521412.

It is an arithmetic number, because the mean of its divisors is an integer number (11002820760).

Almost surely, 2^42544240243 is an apocalyptic number.

42544240243 is a deficient number, since it is larger than the sum of its proper divisors (1467042797).

42544240243 is a wasteful number, since it uses less digits than its factorization.

42544240243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467042796.

The product of its (nonzero) digits is 122880, while the sum is 34.

Adding to 42544240243 its reverse (34204244524), we get a palindrome (76748484767).

The spelling of 42544240243 in words is "forty-two billion, five hundred forty-four million, two hundred forty thousand, two hundred forty-three".