40231 has 2 divisors, whose sum is σ = 40232. Its totient is φ = 40230.

The previous prime is 40213. The next prime is 40237. The reversal of 40231 is 13204.

Together with previous prime (40213) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40231 - 2⁹ = 39719 is a prime.

It is a super-2 number, since 2×40231² = 3237066722, which contains 22 as substring.

It is a Chen prime.

40231 is a lucky number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20115 + 20116.

It is an arithmetic number, because the mean of its divisors is an integer number (20116).

2⁴⁰²³¹ is an apocalyptic number.

40231 is a deficient number, since it is larger than the sum of its proper divisors (1).

40231 is an equidigital number, since it uses as much as digits as its factorization.

40231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 40231 is about 200.5766686332. The cubic root of 40231 is about 34.2652266819.

Adding to 40231 its reverse (13204), we get a palindrome (53435).

The spelling of 40231 in words is "forty thousand, two hundred thirty-one".