43323001321 has 2 divisors, whose sum is σ = 43323001322. Its totient is φ = 43323001320.

The previous prime is 43323001303. The next prime is 43323001333. The reversal of 43323001321 is 12310032334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38417960025 + 4905041296 = 196005^2 + 70036^2 .

It is a cyclic number.

It is not a de Polignac number, because 43323001321 - 2¹⁷ = 43322870249 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43323001292 and 43323001301.

It is not a weakly prime, because it can be changed into another prime (43323001361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21661500660 + 21661500661.

It is an arithmetic number, because the mean of its divisors is an integer number (21661500661).

Almost surely, 2^43323001321 is an apocalyptic number.

It is an amenable number.

43323001321 is a deficient number, since it is larger than the sum of its proper divisors (1).

43323001321 is an equidigital number, since it uses as much as digits as its factorization.

43323001321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1296, while the sum is 22.

Adding to 43323001321 its reverse (12310032334), we get a palindrome (55633033655).

The spelling of 43323001321 in words is "forty-three billion, three hundred twenty-three million, one thousand, three hundred twenty-one".