43243451 has 2 divisors, whose sum is σ = 43243452. Its totient is φ = 43243450.

The previous prime is 43243441. The next prime is 43243457. The reversal of 43243451 is 15434234.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43243451 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43243451.

It is not a weakly prime, because it can be changed into another prime (43243457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21621725 + 21621726.

It is an arithmetic number, because the mean of its divisors is an integer number (21621726).

Almost surely, 2^43243451 is an apocalyptic number.

43243451 is a deficient number, since it is larger than the sum of its proper divisors (1).

43243451 is an equidigital number, since it uses as much as digits as its factorization.

43243451 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5760, while the sum is 26.

The square root of 43243451 is about 6575.9752888830. The cubic root of 43243451 is about 350.9997294392. Note that the first 3 decimals are identical.

Adding to 43243451 its reverse (15434234), we get a palindrome (58677685).

The spelling of 43243451 in words is "forty-three million, two hundred forty-three thousand, four hundred fifty-one".