43278223 has 2 divisors, whose sum is σ = 43278224. Its totient is φ = 43278222.

The previous prime is 43278133. The next prime is 43278227. The reversal of 43278223 is 32287234.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43278223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43278227) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21639111 + 21639112.

It is an arithmetic number, because the mean of its divisors is an integer number (21639112).

Almost surely, 2^43278223 is an apocalyptic number.

43278223 is a deficient number, since it is larger than the sum of its proper divisors (1).

43278223 is an equidigital number, since it uses as much as digits as its factorization.

43278223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16128, while the sum is 31.

The square root of 43278223 is about 6578.6186239970. The cubic root of 43278223 is about 351.0937837021.

The spelling of 43278223 in words is "forty-three million, two hundred seventy-eight thousand, two hundred twenty-three".