43426321 has 2 divisors, whose sum is σ = 43426322. Its totient is φ = 43426320.

The previous prime is 43426303. The next prime is 43426337. The reversal of 43426321 is 12362434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37075921 + 6350400 = 6089^2 + 2520^2 .

It is a cyclic number.

It is not a de Polignac number, because 43426321 - 2¹³ = 43418129 is a prime.

It is not a weakly prime, because it can be changed into another prime (43421321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21713160 + 21713161.

It is an arithmetic number, because the mean of its divisors is an integer number (21713161).

Almost surely, 2^43426321 is an apocalyptic number.

It is an amenable number.

43426321 is a deficient number, since it is larger than the sum of its proper divisors (1).

43426321 is an equidigital number, since it uses as much as digits as its factorization.

43426321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3456, while the sum is 25.

The square root of 43426321 is about 6589.8650213794. The cubic root of 43426321 is about 351.4938085158.

Adding to 43426321 its reverse (12362434), we get a palindrome (55788755).

The spelling of 43426321 in words is "forty-three million, four hundred twenty-six thousand, three hundred twenty-one".