43480421 has 2 divisors, whose sum is σ = 43480422. Its totient is φ = 43480420.

The previous prime is 43480397. The next prime is 43480429. The reversal of 43480421 is 12408434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37957921 + 5522500 = 6161^2 + 2350^2 .

It is a cyclic number.

It is not a de Polignac number, because 43480421 - 2¹⁸ = 43218277 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43480429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21740210 + 21740211.

It is an arithmetic number, because the mean of its divisors is an integer number (21740211).

Almost surely, 2^43480421 is an apocalyptic number.

It is an amenable number.

43480421 is a deficient number, since it is larger than the sum of its proper divisors (1).

43480421 is an equidigital number, since it uses as much as digits as its factorization.

43480421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3072, while the sum is 26.

The square root of 43480421 is about 6593.9685319237. The cubic root of 43480421 is about 351.6397102293.

Adding to 43480421 its reverse (12408434), we get a palindrome (55888855).

The spelling of 43480421 in words is "forty-three million, four hundred eighty thousand, four hundred twenty-one".