43456081 has 2 divisors, whose sum is σ = 43456082. Its totient is φ = 43456080.

The previous prime is 43456069. The next prime is 43456099. The reversal of 43456081 is 18065434.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 43020481 + 435600 = 6559^2 + 660^2 .

It is a cyclic number.

It is not a de Polignac number, because 43456081 - 2⁹ = 43455569 is a prime.

It is a super-2 number, since 2×43456081² = 3776861951757122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (43456001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21728040 + 21728041.

It is an arithmetic number, because the mean of its divisors is an integer number (21728041).

Almost surely, 2^43456081 is an apocalyptic number.

It is an amenable number.

43456081 is a deficient number, since it is larger than the sum of its proper divisors (1).

43456081 is an equidigital number, since it uses as much as digits as its factorization.

43456081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 43456081 is about 6592.1226475241. The cubic root of 43456081 is about 351.5740829277.

The spelling of 43456081 in words is "forty-three million, four hundred fifty-six thousand, eighty-one".