43323383561 has 2 divisors, whose sum is σ = 43323383562. Its totient is φ = 43323383560.

The previous prime is 43323383507. The next prime is 43323383567. The reversal of 43323383561 is 16538332334.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42256969225 + 1066414336 = 205565^2 + 32656^2 .

It is a cyclic number.

It is not a de Polignac number, because 43323383561 - 2³⁰ = 42249641737 is a prime.

It is not a weakly prime, because it can be changed into another prime (43323383567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21661691780 + 21661691781.

It is an arithmetic number, because the mean of its divisors is an integer number (21661691781).

Almost surely, 2^43323383561 is an apocalyptic number.

It is an amenable number.

43323383561 is a deficient number, since it is larger than the sum of its proper divisors (1).

43323383561 is an equidigital number, since it uses as much as digits as its factorization.

43323383561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 466560, while the sum is 41.

The spelling of 43323383561 in words is "forty-three billion, three hundred twenty-three million, three hundred eighty-three thousand, five hundred sixty-one".