43263421 has 2 divisors, whose sum is σ = 43263422. Its totient is φ = 43263420.

The previous prime is 43263403. The next prime is 43263427. The reversal of 43263421 is 12436234.

43263421 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., 42640900 + 622521 = 6530^2 + 789^2 .

It is a cyclic number.

It is not a de Polignac number, because 43263421 - 2¹⁵ = 43230653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43263427) 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, 21631710 + 21631711.

It is an arithmetic number, because the mean of its divisors is an integer number (21631711).

Almost surely, 2^43263421 is an apocalyptic number.

It is an amenable number.

43263421 is a deficient number, since it is larger than the sum of its proper divisors (1).

43263421 is an equidigital number, since it uses as much as digits as its factorization.

43263421 is an odious number, because the sum of its binary digits is odd.

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

The square root of 43263421 is about 6577.4935195711. The cubic root of 43263421 is about 351.0537521541.

Adding to 43263421 its reverse (12436234), we get a palindrome (55699655).

The spelling of 43263421 in words is "forty-three million, two hundred sixty-three thousand, four hundred twenty-one".