43223539 has 2 divisors, whose sum is σ = 43223540. Its totient is φ = 43223538.

The previous prime is 43223533. The next prime is 43223549. The reversal of 43223539 is 93532234.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43223539 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43223539.

It is not a weakly prime, because it can be changed into another prime (43223533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21611769 + 21611770.

It is an arithmetic number, because the mean of its divisors is an integer number (21611770).

Almost surely, 2^43223539 is an apocalyptic number.

43223539 is a deficient number, since it is larger than the sum of its proper divisors (1).

43223539 is an equidigital number, since it uses as much as digits as its factorization.

43223539 is an evil number, because the sum of its binary digits is even.

The product of its digits is 19440, while the sum is 31.

The square root of 43223539 is about 6574.4611186013. The cubic root of 43223539 is about 350.9458470635.

The spelling of 43223539 in words is "forty-three million, two hundred twenty-three thousand, five hundred thirty-nine".