42550663 has 4 divisors (see below), whose sum is σ = 42565320. Its totient is φ = 42536008.

The previous prime is 42550649. The next prime is 42550687. The reversal of 42550663 is 36605524.

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 42550663 - 2¹⁷ = 42419591 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42550603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1345 + ... + 9322.

It is an arithmetic number, because the mean of its divisors is an integer number (10641330).

Almost surely, 2^42550663 is an apocalyptic number.

42550663 is a deficient number, since it is larger than the sum of its proper divisors (14657).

42550663 is a wasteful number, since it uses less digits than its factorization.

42550663 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14656.

The product of its (nonzero) digits is 21600, while the sum is 31.

The square root of 42550663 is about 6523.0869226157. The cubic root of 42550663 is about 349.1152155290.

The spelling of 42550663 in words is "forty-two million, five hundred fifty thousand, six hundred sixty-three".