43323121 has 2 divisors, whose sum is σ = 43323122. Its totient is φ = 43323120.

The previous prime is 43323109. The next prime is 43323131. The reversal of 43323121 is 12132334.

43323121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 23386896 + 19936225 = 4836^2 + 4465^2 .

It is a cyclic number.

It is not a de Polignac number, because 43323121 - 2²³ = 34934513 is a prime.

It is not a weakly prime, because it can be changed into another prime (43323131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21661560 + 21661561.

It is an arithmetic number, because the mean of its divisors is an integer number (21661561).

Almost surely, 2^43323121 is an apocalyptic number.

It is an amenable number.

43323121 is a deficient number, since it is larger than the sum of its proper divisors (1).

43323121 is an equidigital number, since it uses as much as digits as its factorization.

43323121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 432, while the sum is 19.

The square root of 43323121 is about 6582.0301579376. The cubic root of 43323121 is about 351.2151531393.

Adding to 43323121 its reverse (12132334), we get a palindrome (55455455).

The spelling of 43323121 in words is "forty-three million, three hundred twenty-three thousand, one hundred twenty-one".