43523231 has 2 divisors, whose sum is σ = 43523232. Its totient is φ = 43523230.

The previous prime is 43523219. The next prime is 43523239. The reversal of 43523231 is 13232534.

43523231 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43523231 - 2¹⁰ = 43522207 is a prime.

It is a super-2 number, since 2×43523231² = 3788543273358722, which contains 22 as substring.

It is equal to p_2634323 and since 43523231 and 2634323 have the same sum of digits, it is a Honaker prime.

It is a junction number, because it is equal to n+sod(n) for n = 43523197 and 43523206.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43523239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21761615 + 21761616.

It is an arithmetic number, because the mean of its divisors is an integer number (21761616).

Almost surely, 2^43523231 is an apocalyptic number.

43523231 is a deficient number, since it is larger than the sum of its proper divisors (1).

43523231 is an equidigital number, since it uses as much as digits as its factorization.

43523231 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2160, while the sum is 23.

The square root of 43523231 is about 6597.2138816322. The cubic root of 43523231 is about 351.7550783101.

Adding to 43523231 its reverse (13232534), we get a palindrome (56755765).

The spelling of 43523231 in words is "forty-three million, five hundred twenty-three thousand, two hundred thirty-one".