43023221 has 2 divisors, whose sum is σ = 43023222. Its totient is φ = 43023220.

The previous prime is 43023173. The next prime is 43023251. The reversal of 43023221 is 12232034.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41460721 + 1562500 = 6439^2 + 1250^2 .

It is a cyclic number.

It is not a de Polignac number, because 43023221 - 2¹⁰ = 43022197 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 43023221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43023251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21511610 + 21511611.

It is an arithmetic number, because the mean of its divisors is an integer number (21511611).

Almost surely, 2^43023221 is an apocalyptic number.

It is an amenable number.

43023221 is a deficient number, since it is larger than the sum of its proper divisors (1).

43023221 is an equidigital number, since it uses as much as digits as its factorization.

43023221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 43023221 is about 6559.2088699781. The cubic root of 43023221 is about 350.4028585710.

Adding to 43023221 its reverse (12232034), we get a palindrome (55255255).

The spelling of 43023221 in words is "forty-three million, twenty-three thousand, two hundred twenty-one".