43161457 has 2 divisors, whose sum is σ = 43161458. Its totient is φ = 43161456.

The previous prime is 43161449. The next prime is 43161491. The reversal of 43161457 is 75416134.

43161457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30459361 + 12702096 = 5519^2 + 3564^2 .

It is a cyclic number.

It is not a de Polignac number, because 43161457 - 2³ = 43161449 is a prime.

It is a super-2 number, since 2×43161457² = 3725822740725698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43161497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21580728 + 21580729.

It is an arithmetic number, because the mean of its divisors is an integer number (21580729).

Almost surely, 2^43161457 is an apocalyptic number.

It is an amenable number.

43161457 is a deficient number, since it is larger than the sum of its proper divisors (1).

43161457 is an equidigital number, since it uses as much as digits as its factorization.

43161457 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10080, while the sum is 31.

The square root of 43161457 is about 6569.7379704217. The cubic root of 43161457 is about 350.7777452991. Note that the first 4 decimals are identical.

The spelling of 43161457 in words is "forty-three million, one hundred sixty-one thousand, four hundred fifty-seven".