43143481 has 2 divisors, whose sum is σ = 43143482. Its totient is φ = 43143480.

The previous prime is 43143479. The next prime is 43143487. The reversal of 43143481 is 18434134.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 34047225 + 9096256 = 5835^2 + 3016^2 .

It is a cyclic number.

It is not a de Polignac number, because 43143481 - 2¹ = 43143479 is a prime.

It is a super-2 number, since 2×43143481² = 3722719905594722, which contains 22 as substring.

Together with 43143479, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (43143487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21571740 + 21571741.

It is an arithmetic number, because the mean of its divisors is an integer number (21571741).

Almost surely, 2^43143481 is an apocalyptic number.

It is an amenable number.

43143481 is a deficient number, since it is larger than the sum of its proper divisors (1).

43143481 is an equidigital number, since it uses as much as digits as its factorization.

43143481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4608, while the sum is 28.

The square root of 43143481 is about 6568.3697368525. The cubic root of 43143481 is about 350.7290409165.

The spelling of 43143481 in words is "forty-three million, one hundred forty-three thousand, four hundred eighty-one".