43255813 has 2 divisors, whose sum is σ = 43255814. Its totient is φ = 43255812.

The previous prime is 43255811. The next prime is 43255829. The reversal of 43255813 is 31855234.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21883684 + 21372129 = 4678^2 + 4623^2 .

It is a cyclic number.

It is not a de Polignac number, because 43255813 - 2¹ = 43255811 is a prime.

Together with 43255811, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43255811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21627906 + 21627907.

It is an arithmetic number, because the mean of its divisors is an integer number (21627907).

Almost surely, 2^43255813 is an apocalyptic number.

It is an amenable number.

43255813 is a deficient number, since it is larger than the sum of its proper divisors (1).

43255813 is an equidigital number, since it uses as much as digits as its factorization.

43255813 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14400, while the sum is 31.

The square root of 43255813 is about 6576.9151583398. The cubic root of 43255813 is about 351.0331730024.

The spelling of 43255813 in words is "forty-three million, two hundred fifty-five thousand, eight hundred thirteen".