43472161 has 2 divisors, whose sum is σ = 43472162. Its totient is φ = 43472160.

The previous prime is 43472159. The next prime is 43472167. The reversal of 43472161 is 16127434.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31528225 + 11943936 = 5615^2 + 3456^2 .

It is a cyclic number.

It is not a de Polignac number, because 43472161 - 2¹ = 43472159 is a prime.

Together with 43472159, it forms a pair of twin primes.

It is an alternating number because its digits alternate between even and odd.

It is not a weakly prime, because it can be changed into another prime (43472167) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21736080 + 21736081.

It is an arithmetic number, because the mean of its divisors is an integer number (21736081).

Almost surely, 2^43472161 is an apocalyptic number.

It is an amenable number.

43472161 is a deficient number, since it is larger than the sum of its proper divisors (1).

43472161 is an equidigital number, since it uses as much as digits as its factorization.

43472161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 28.

The square root of 43472161 is about 6593.3421722219. The cubic root of 43472161 is about 351.6174417547.

Adding to 43472161 its reverse (16127434), we get a palindrome (59599595).

The spelling of 43472161 in words is "forty-three million, four hundred seventy-two thousand, one hundred sixty-one".