43781481427 has 2 divisors, whose sum is σ = 43781481428. Its totient is φ = 43781481426.

The previous prime is 43781481391. The next prime is 43781481467. The reversal of 43781481427 is 72418418734.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43781481427 is a prime.

It is not a weakly prime, because it can be changed into another prime (43781481467) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21890740713 + 21890740714.

It is an arithmetic number, because the mean of its divisors is an integer number (21890740714).

Almost surely, 2^43781481427 is an apocalyptic number.

43781481427 is a deficient number, since it is larger than the sum of its proper divisors (1).

43781481427 is an equidigital number, since it uses as much as digits as its factorization.

43781481427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1204224, while the sum is 49.

The spelling of 43781481427 in words is "forty-three billion, seven hundred eighty-one million, four hundred eighty-one thousand, four hundred twenty-seven".