43031423 has 2 divisors, whose sum is σ = 43031424. Its totient is φ = 43031422.

The previous prime is 43031419. The next prime is 43031453. The reversal of 43031423 is 32413034.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43031423 - 2² = 43031419 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43031395 and 43031404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43031453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21515711 + 21515712.

It is an arithmetic number, because the mean of its divisors is an integer number (21515712).

Almost surely, 2^43031423 is an apocalyptic number.

43031423 is a deficient number, since it is larger than the sum of its proper divisors (1).

43031423 is an equidigital number, since it uses as much as digits as its factorization.

43031423 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 43031423 is about 6559.8340680234. The cubic root of 43031423 is about 350.4251242341.

Adding to 43031423 its reverse (32413034), we get a palindrome (75444457).

The spelling of 43031423 in words is "forty-three million, thirty-one thousand, four hundred twenty-three".