43318481 has 2 divisors, whose sum is σ = 43318482. Its totient is φ = 43318480.

The previous prime is 43318477. The next prime is 43318487. The reversal of 43318481 is 18481334.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32035600 + 11282881 = 5660^2 + 3359^2 .

It is a cyclic number.

It is not a de Polignac number, because 43318481 - 2² = 43318477 is a prime.

It is a super-2 number, since 2×43318481² = 3752981592294722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43318487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21659240 + 21659241.

It is an arithmetic number, because the mean of its divisors is an integer number (21659241).

Almost surely, 2^43318481 is an apocalyptic number.

It is an amenable number.

43318481 is a deficient number, since it is larger than the sum of its proper divisors (1).

43318481 is an equidigital number, since it uses as much as digits as its factorization.

43318481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9216, while the sum is 32.

The square root of 43318481 is about 6581.6776736635. The cubic root of 43318481 is about 351.2026140574.

The spelling of 43318481 in words is "forty-three million, three hundred eighteen thousand, four hundred eighty-one".