42331 has 2 divisors, whose sum is σ = 42332. Its totient is φ = 42330.

The previous prime is 42323. The next prime is 42337. The reversal of 42331 is 13324.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42331 - 2³ = 42323 is a prime.

It is a super-2 number, since 2×42331² = 3583827122, which contains 22 as substring.

It is a nialpdrome in base 15.

It is not a weakly prime, because it can be changed into another prime (42337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21165 + 21166.

It is an arithmetic number, because the mean of its divisors is an integer number (21166).

2⁴²³³¹ is an apocalyptic number.

42331 is a deficient number, since it is larger than the sum of its proper divisors (1).

42331 is an equidigital number, since it uses as much as digits as its factorization.

42331 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72, while the sum is 13.

The square root of 42331 is about 205.7449877883. The cubic root of 42331 is about 34.8513422797.

Adding to 42331 its reverse (13324), we get a palindrome (55655).

It can be divided in two parts, 423 and 31, that added together give a palindrome (454).

The spelling of 42331 in words is "forty-two thousand, three hundred thirty-one".