42531636 has 24 divisors (see below), whose sum is σ = 113417920. Its totient is φ = 12151872.

The previous prime is 42531617. The next prime is 42531641. The reversal of 42531636 is 63613524.

42531636 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 7 ways as a sum of consecutive naturals, for example, 253081 + ... + 253248.

Almost surely, 2^42531636 is an apocalyptic number.

It is an amenable number.

42531636 is an abundant number, since it is smaller than the sum of its proper divisors (70886284).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42531636 is a wasteful number, since it uses less digits than its factorization.

42531636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 506343 (or 506341 counting only the distinct ones).

The product of its digits is 12960, while the sum is 30.

The square root of 42531636 is about 6521.6283242761. The cubic root of 42531636 is about 349.0631708597.

The spelling of 42531636 in words is "forty-two million, five hundred thirty-one thousand, six hundred thirty-six".