43271231 has 2 divisors, whose sum is σ = 43271232. Its totient is φ = 43271230.

The previous prime is 43271191. The next prime is 43271237. The reversal of 43271231 is 13217234.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43271231 - 2²² = 39076927 is a prime.

It is a super-2 number, since 2×43271231² = 3744798864510722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 43271197 and 43271206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43271237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21635615 + 21635616.

It is an arithmetic number, because the mean of its divisors is an integer number (21635616).

Almost surely, 2^43271231 is an apocalyptic number.

43271231 is a deficient number, since it is larger than the sum of its proper divisors (1).

43271231 is an equidigital number, since it uses as much as digits as its factorization.

43271231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1008, while the sum is 23.

The square root of 43271231 is about 6578.0871839768. The cubic root of 43271231 is about 351.0748751935.

Adding to 43271231 its reverse (13217234), we get a palindrome (56488465).

The spelling of 43271231 in words is "forty-three million, two hundred seventy-one thousand, two hundred thirty-one".