43214336681 has 2 divisors, whose sum is σ = 43214336682. Its totient is φ = 43214336680.

The previous prime is 43214336653. The next prime is 43214336707. The reversal of 43214336681 is 18663341234.

43214336681 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27157392025 + 16056944656 = 164795^2 + 126716^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43214336681 is a prime.

It is a super-2 number, since 2×43214336681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43214326681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21607168340 + 21607168341.

It is an arithmetic number, because the mean of its divisors is an integer number (21607168341).

Almost surely, 2^43214336681 is an apocalyptic number.

It is an amenable number.

43214336681 is a deficient number, since it is larger than the sum of its proper divisors (1).

43214336681 is an equidigital number, since it uses as much as digits as its factorization.

43214336681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 41.

The spelling of 43214336681 in words is "forty-three billion, two hundred fourteen million, three hundred thirty-six thousand, six hundred eighty-one".