43211055161 has 2 divisors, whose sum is σ = 43211055162. Its totient is φ = 43211055160.

The previous prime is 43211055119. The next prime is 43211055193. The reversal of 43211055161 is 16155011234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35826918400 + 7384136761 = 189280^2 + 85931^2 .

It is a cyclic number.

It is not a de Polignac number, because 43211055161 - 2²⁶ = 43143946297 is a prime.

It is not a weakly prime, because it can be changed into another prime (43211055761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21605527580 + 21605527581.

It is an arithmetic number, because the mean of its divisors is an integer number (21605527581).

Almost surely, 2^43211055161 is an apocalyptic number.

It is an amenable number.

43211055161 is a deficient number, since it is larger than the sum of its proper divisors (1).

43211055161 is an equidigital number, since it uses as much as digits as its factorization.

43211055161 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3600, while the sum is 29.

Adding to 43211055161 its reverse (16155011234), we get a palindrome (59366066395).

The spelling of 43211055161 in words is "forty-three billion, two hundred eleven million, fifty-five thousand, one hundred sixty-one".