43404003431 has 2 divisors, whose sum is σ = 43404003432. Its totient is φ = 43404003430.

The previous prime is 43404003329. The next prime is 43404003437. The reversal of 43404003431 is 13430040434.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43404003431 - 2¹⁸ = 43403741287 is a prime.

It is a super-2 number, since 2×43404003431² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 43404003431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43404003437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21702001715 + 21702001716.

It is an arithmetic number, because the mean of its divisors is an integer number (21702001716).

Almost surely, 2^43404003431 is an apocalyptic number.

43404003431 is a deficient number, since it is larger than the sum of its proper divisors (1).

43404003431 is an equidigital number, since it uses as much as digits as its factorization.

43404003431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 43404003431 its reverse (13430040434), we get a palindrome (56834043865).

The spelling of 43404003431 in words is "forty-three billion, four hundred four million, three thousand, four hundred thirty-one".