43255657 has 2 divisors, whose sum is σ = 43255658. Its totient is φ = 43255656.

The previous prime is 43255631. The next prime is 43255679. The reversal of 43255657 is 75655234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43243776 + 11881 = 6576^2 + 109^2 .

It is a cyclic number.

It is not a de Polignac number, because 43255657 - 2¹⁵ = 43222889 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43255607) 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, 21627828 + 21627829.

It is an arithmetic number, because the mean of its divisors is an integer number (21627829).

Almost surely, 2^43255657 is an apocalyptic number.

It is an amenable number.

43255657 is a deficient number, since it is larger than the sum of its proper divisors (1).

43255657 is an equidigital number, since it uses as much as digits as its factorization.

43255657 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 126000, while the sum is 37.

The square root of 43255657 is about 6576.9032986657. The cubic root of 43255657 is about 351.0327510071.

The spelling of 43255657 in words is "forty-three million, two hundred fifty-five thousand, six hundred fifty-seven".