42231791 has 16 divisors (see below), whose sum is σ = 51296256. Its totient is φ = 33941376.

The previous prime is 42231779. The next prime is 42231793. The reversal of 42231791 is 19713224.

It is a de Polignac number, because none of the positive numbers 2^k-42231791 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 (42231793) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43190 + ... + 44156.

It is an arithmetic number, because the mean of its divisors is an integer number (3206016).

Almost surely, 2^42231791 is an apocalyptic number.

42231791 is a deficient number, since it is larger than the sum of its proper divisors (9064465).

42231791 is a wasteful number, since it uses less digits than its factorization.

42231791 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1358.

The product of its digits is 3024, while the sum is 29.

The square root of 42231791 is about 6498.5991567414. The cubic root of 42231791 is about 348.2409454598.

The spelling of 42231791 in words is "forty-two million, two hundred thirty-one thousand, seven hundred ninety-one".