56381447 has 2 divisors, whose sum is σ = 56381448. Its totient is φ = 56381446.

The previous prime is 56381443. The next prime is 56381489. The reversal of 56381447 is 74418365.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 56381447 - 2² = 56381443 is a prime.

It is a Chen prime.

It is equal to p_3359747 and since 56381447 and 3359747 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 56381447.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56381443) 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, 28190723 + 28190724.

It is an arithmetic number, because the mean of its divisors is an integer number (28190724).

Almost surely, 2^56381447 is an apocalyptic number.

56381447 is a deficient number, since it is larger than the sum of its proper divisors (1).

56381447 is an equidigital number, since it uses as much as digits as its factorization.

56381447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 80640, while the sum is 38.

The square root of 56381447 is about 7508.7580198059. The cubic root of 56381447 is about 383.4529405382.

The spelling of 56381447 in words is "fifty-six million, three hundred eighty-one thousand, four hundred forty-seven".