43056491 has 2 divisors, whose sum is σ = 43056492. Its totient is φ = 43056490.

The previous prime is 43056487. The next prime is 43056539. The reversal of 43056491 is 19465034.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 43056491 - 2² = 43056487 is a prime.

It is a super-2 number, since 2×43056491² = 3707722834466162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43056421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21528245 + 21528246.

It is an arithmetic number, because the mean of its divisors is an integer number (21528246).

Almost surely, 2^43056491 is an apocalyptic number.

43056491 is a deficient number, since it is larger than the sum of its proper divisors (1).

43056491 is an equidigital number, since it uses as much as digits as its factorization.

43056491 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12960, while the sum is 32.

The square root of 43056491 is about 6561.7445088940. The cubic root of 43056491 is about 350.4931578643.

The spelling of 43056491 in words is "forty-three million, fifty-six thousand, four hundred ninety-one".