43403223161 has 2 divisors, whose sum is σ = 43403223162. Its totient is φ = 43403223160.

The previous prime is 43403223121. The next prime is 43403223179. The reversal of 43403223161 is 16132230434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39419719936 + 3983503225 = 198544^2 + 63115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43403223161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (43403223121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21701611580 + 21701611581.

It is an arithmetic number, because the mean of its divisors is an integer number (21701611581).

Almost surely, 2^43403223161 is an apocalyptic number.

It is an amenable number.

43403223161 is a deficient number, since it is larger than the sum of its proper divisors (1).

43403223161 is an equidigital number, since it uses as much as digits as its factorization.

43403223161 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 43403223161 its reverse (16132230434), we get a palindrome (59535453595).

The spelling of 43403223161 in words is "forty-three billion, four hundred three million, two hundred twenty-three thousand, one hundred sixty-one".