42643563 has 8 divisors (see below), whose sum is σ = 56895888. Its totient is φ = 28410144.

The previous prime is 42643547. The next prime is 42643583. The reversal of 42643563 is 36534624.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 42643563 - 2⁴ = 42643547 is a prime.

It is not an unprimeable number, because it can be changed into a prime (42643583) 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, 1845 + ... + 9417.

It is an arithmetic number, because the mean of its divisors is an integer number (7111986).

Almost surely, 2^42643563 is an apocalyptic number.

42643563 is a deficient number, since it is larger than the sum of its proper divisors (14252325).

42643563 is a wasteful number, since it uses less digits than its factorization.

42643563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9453.

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

The square root of 42643563 is about 6530.2039018701. The cubic root of 42643563 is about 349.3691029073.

The spelling of 42643563 in words is "forty-two million, six hundred forty-three thousand, five hundred sixty-three".