43234643281 has 2 divisors, whose sum is σ = 43234643282. Its totient is φ = 43234643280.

The previous prime is 43234643197. The next prime is 43234643327. The reversal of 43234643281 is 18234643234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39408602256 + 3826041025 = 198516^2 + 61855^2 .

It is a cyclic number.

It is not a de Polignac number, because 43234643281 - 2¹⁵ = 43234610513 is a prime.

It is a super-2 number, since 2×43234643281² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43234643581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21617321640 + 21617321641.

It is an arithmetic number, because the mean of its divisors is an integer number (21617321641).

Almost surely, 2^43234643281 is an apocalyptic number.

It is an amenable number.

43234643281 is a deficient number, since it is larger than the sum of its proper divisors (1).

43234643281 is an equidigital number, since it uses as much as digits as its factorization.

43234643281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 40.

The spelling of 43234643281 in words is "forty-three billion, two hundred thirty-four million, six hundred forty-three thousand, two hundred eighty-one".