43531457 has 2 divisors, whose sum is σ = 43531458. Its totient is φ = 43531456.

The previous prime is 43531429. The next prime is 43531459. The reversal of 43531457 is 75413534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42523441 + 1008016 = 6521^2 + 1004^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43531457 is a prime.

Together with 43531459, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43531459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21765728 + 21765729.

It is an arithmetic number, because the mean of its divisors is an integer number (21765729).

Almost surely, 2^43531457 is an apocalyptic number.

It is an amenable number.

43531457 is a deficient number, since it is larger than the sum of its proper divisors (1).

43531457 is an equidigital number, since it uses as much as digits as its factorization.

43531457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 32.

The square root of 43531457 is about 6597.8372971755. The cubic root of 43531457 is about 351.7772377786. Note that the first 3 decimals are identical.

The spelling of 43531457 in words is "forty-three million, five hundred thirty-one thousand, four hundred fifty-seven".