43003161 has 6 divisors (see below), whose sum is σ = 62115690. Its totient is φ = 28668768.

The previous prime is 43003157. The next prime is 43003199. The reversal of 43003161 is 16130034.

It can be written as a sum of positive squares in only one way, i.e., 26842761 + 16160400 = 5181^2 + 4020^2 .

It is not a de Polignac number, because 43003161 - 2² = 43003157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (43003111) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2389056 + ... + 2389073.

It is an arithmetic number, because the mean of its divisors is an integer number (10352615).

Almost surely, 2^43003161 is an apocalyptic number.

It is an amenable number.

43003161 is a deficient number, since it is larger than the sum of its proper divisors (19112529).

43003161 is a wasteful number, since it uses less digits than its factorization.

43003161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4778135 (or 4778132 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

The square root of 43003161 is about 6557.6795438631. The cubic root of 43003161 is about 350.3483905115.

Adding to 43003161 its reverse (16130034), we get a palindrome (59133195).

The spelling of 43003161 in words is "forty-three million, three thousand, one hundred sixty-one".