42231087 has 12 divisors (see below), whose sum is σ = 61312680. Its totient is φ = 28009968.

The previous prime is 42231073. The next prime is 42231103. The reversal of 42231087 is 78013224.

It is not a de Polignac number, because 42231087 - 2¹⁰ = 42230063 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42231087.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42231067) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10137 + ... + 13682.

It is an arithmetic number, because the mean of its divisors is an integer number (5109390).

Almost surely, 2^42231087 is an apocalyptic number.

42231087 is a deficient number, since it is larger than the sum of its proper divisors (19081593).

42231087 is a wasteful number, since it uses less digits than its factorization.

42231087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24022 (or 24019 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 42231087 is about 6498.5449909961. The cubic root of 42231087 is about 348.2390104011.

The spelling of 42231087 in words is "forty-two million, two hundred thirty-one thousand, eighty-seven".