43211386657 has 2 divisors, whose sum is σ = 43211386658. Its totient is φ = 43211386656.

The previous prime is 43211386651. The next prime is 43211386663. The reversal of 43211386657 is 75668311234.

43211386657 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (43211386651) and next prime (43211386663).

It can be written as a sum of positive squares in only one way, i.e., 42357344481 + 854042176 = 205809^2 + 29224^2 .

It is a cyclic number.

It is not a de Polignac number, because 43211386657 - 2⁷ = 43211386529 is a prime.

It is not a weakly prime, because it can be changed into another prime (43211386651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21605693328 + 21605693329.

It is an arithmetic number, because the mean of its divisors is an integer number (21605693329).

Almost surely, 2^43211386657 is an apocalyptic number.

It is an amenable number.

43211386657 is a deficient number, since it is larger than the sum of its proper divisors (1).

43211386657 is an equidigital number, since it uses as much as digits as its factorization.

43211386657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 725760, while the sum is 46.

The spelling of 43211386657 in words is "forty-three billion, two hundred eleven million, three hundred eighty-six thousand, six hundred fifty-seven".