43124321 has 2 divisors, whose sum is σ = 43124322. Its totient is φ = 43124320.

The previous prime is 43124311. The next prime is 43124329. The reversal of 43124321 is 12342134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42837025 + 287296 = 6545^2 + 536^2 .

It is a cyclic number.

It is not a de Polignac number, because 43124321 - 2¹⁸ = 42862177 is a prime.

It is a super-2 number, since 2×43124321² = 3719414123422082, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 43124293 and 43124302.

It is not a weakly prime, because it can be changed into another prime (43124329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21562160 + 21562161.

It is an arithmetic number, because the mean of its divisors is an integer number (21562161).

Almost surely, 2^43124321 is an apocalyptic number.

It is an amenable number.

43124321 is a deficient number, since it is larger than the sum of its proper divisors (1).

43124321 is an equidigital number, since it uses as much as digits as its factorization.

43124321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 576, while the sum is 20.

The square root of 43124321 is about 6566.9110699019. The cubic root of 43124321 is about 350.6771136937.

Adding to 43124321 its reverse (12342134), we get a palindrome (55466455).

The spelling of 43124321 in words is "forty-three million, one hundred twenty-four thousand, three hundred twenty-one".