43430433257 has 2 divisors, whose sum is σ = 43430433258. Its totient is φ = 43430433256.

The previous prime is 43430433203. The next prime is 43430433271. The reversal of 43430433257 is 75233403434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42273004816 + 1157428441 = 205604^2 + 34021^2 .

It is a cyclic number.

It is not a de Polignac number, because 43430433257 - 2²⁶ = 43363324393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43430433257.

It is not a weakly prime, because it can be changed into another prime (43430433457) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21715216628 + 21715216629.

It is an arithmetic number, because the mean of its divisors is an integer number (21715216629).

Almost surely, 2^43430433257 is an apocalyptic number.

It is an amenable number.

43430433257 is a deficient number, since it is larger than the sum of its proper divisors (1).

43430433257 is an equidigital number, since it uses as much as digits as its factorization.

43430433257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 362880, while the sum is 38.

The spelling of 43430433257 in words is "forty-three billion, four hundred thirty million, four hundred thirty-three thousand, two hundred fifty-seven".