42543663 has 4 divisors (see below), whose sum is σ = 56724888. Its totient is φ = 28362440.

The previous prime is 42543653. The next prime is 42543671. The reversal of 42543663 is 36634524.

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 42543663 - 2⁴ = 42543647 is a prime.

It is a super-2 number, since 2×42543663² = 3619926522915138, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42543623) 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, 7090608 + ... + 7090613.

It is an arithmetic number, because the mean of its divisors is an integer number (14181222).

Almost surely, 2^42543663 is an apocalyptic number.

42543663 is a deficient number, since it is larger than the sum of its proper divisors (14181225).

42543663 is a wasteful number, since it uses less digits than its factorization.

42543663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14181224.

The product of its digits is 51840, while the sum is 33.

The square root of 42543663 is about 6522.5503447655. The cubic root of 42543663 is about 349.0960701906.

The spelling of 42543663 in words is "forty-two million, five hundred forty-three thousand, six hundred sixty-three".