43255391 has 2 divisors, whose sum is σ = 43255392. Its totient is φ = 43255390.

The previous prime is 43255357. The next prime is 43255417. The reversal of 43255391 is 19355234.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43255391 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43255301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21627695 + 21627696.

It is an arithmetic number, because the mean of its divisors is an integer number (21627696).

Almost surely, 2^43255391 is an apocalyptic number.

43255391 is a deficient number, since it is larger than the sum of its proper divisors (1).

43255391 is an equidigital number, since it uses as much as digits as its factorization.

43255391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16200, while the sum is 32.

The square root of 43255391 is about 6576.8830763516. The cubic root of 43255391 is about 351.0320314488.

The spelling of 43255391 in words is "forty-three million, two hundred fifty-five thousand, three hundred ninety-one".