42531668 has 12 divisors (see below), whose sum is σ = 74581920. Its totient is φ = 21222552.

The previous prime is 42531649. The next prime is 42531679. The reversal of 42531668 is 86613524.

42531668 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8558 + ... + 12581.

It is an arithmetic number, because the mean of its divisors is an integer number (6215160).

Almost surely, 2^42531668 is an apocalyptic number.

It is an amenable number.

42531668 is a deficient number, since it is larger than the sum of its proper divisors (32050252).

42531668 is a wasteful number, since it uses less digits than its factorization.

42531668 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21646 (or 21644 counting only the distinct ones).

The product of its digits is 34560, while the sum is 35.

The square root of 42531668 is about 6521.6307776506. The cubic root of 42531668 is about 349.0632584025.

The spelling of 42531668 in words is "forty-two million, five hundred thirty-one thousand, six hundred sixty-eight".