43148321 has 2 divisors, whose sum is σ = 43148322. Its totient is φ = 43148320.

The previous prime is 43148263. The next prime is 43148323. The reversal of 43148321 is 12384134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42719296 + 429025 = 6536^2 + 655^2 .

It is a cyclic number.

It is not a de Polignac number, because 43148321 - 2¹⁰ = 43147297 is a prime.

Together with 43148323, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43148323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21574160 + 21574161.

It is an arithmetic number, because the mean of its divisors is an integer number (21574161).

Almost surely, 2^43148321 is an apocalyptic number.

It is an amenable number.

43148321 is a deficient number, since it is larger than the sum of its proper divisors (1).

43148321 is an equidigital number, since it uses as much as digits as its factorization.

43148321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2304, while the sum is 26.

The square root of 43148321 is about 6568.7381588856. The cubic root of 43148321 is about 350.7421557993.

The spelling of 43148321 in words is "forty-three million, one hundred forty-eight thousand, three hundred twenty-one".