43161021503 has 2 divisors, whose sum is σ = 43161021504. Its totient is φ = 43161021502.

The previous prime is 43161021479. The next prime is 43161021521. The reversal of 43161021503 is 30512016134.

43161021503 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 43161021503 - 2⁶ = 43161021439 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43161051503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21580510751 + 21580510752.

It is an arithmetic number, because the mean of its divisors is an integer number (21580510752).

Almost surely, 2^43161021503 is an apocalyptic number.

43161021503 is a deficient number, since it is larger than the sum of its proper divisors (1).

43161021503 is an equidigital number, since it uses as much as digits as its factorization.

43161021503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 26.

Adding to 43161021503 its reverse (30512016134), we get a palindrome (73673037637).

The spelling of 43161021503 in words is "forty-three billion, one hundred sixty-one million, twenty-one thousand, five hundred three".