40727231 has 2 divisors, whose sum is σ = 40727232. Its totient is φ = 40727230.

The previous prime is 40727207. The next prime is 40727237. The reversal of 40727231 is 13272704.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40727231 - 2¹⁴ = 40710847 is a prime.

It is a super-2 number, since 2×40727231² = 3317414689854722, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40727231.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40727237) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20363615 + 20363616.

It is an arithmetic number, because the mean of its divisors is an integer number (20363616).

Almost surely, 2^40727231 is an apocalyptic number.

40727231 is a deficient number, since it is larger than the sum of its proper divisors (1).

40727231 is an equidigital number, since it uses as much as digits as its factorization.

40727231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2352, while the sum is 26.

The square root of 40727231 is about 6381.7890124949. The cubic root of 40727231 is about 344.0553335138.

Adding to 40727231 its reverse (13272704), we get a palindrome (53999935).

The spelling of 40727231 in words is "forty million, seven hundred twenty-seven thousand, two hundred thirty-one".