43227743681 has 2 divisors, whose sum is σ = 43227743682. Its totient is φ = 43227743680.

The previous prime is 43227743479. The next prime is 43227743711. The reversal of 43227743681 is 18634772234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38767641025 + 4460102656 = 196895^2 + 66784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43227743681 is a prime.

It is a super-2 number, since 2×43227743681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43227743281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21613871840 + 21613871841.

It is an arithmetic number, because the mean of its divisors is an integer number (21613871841).

Almost surely, 2^43227743681 is an apocalyptic number.

It is an amenable number.

43227743681 is a deficient number, since it is larger than the sum of its proper divisors (1).

43227743681 is an equidigital number, since it uses as much as digits as its factorization.

43227743681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1354752, while the sum is 47.

The spelling of 43227743681 in words is "forty-three billion, two hundred twenty-seven million, seven hundred forty-three thousand, six hundred eighty-one".