56081647 has 2 divisors, whose sum is σ = 56081648. Its totient is φ = 56081646.

The previous prime is 56081633. The next prime is 56081653. The reversal of 56081647 is 74618065.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-56081647 is a prime.

It is a super-2 number, since 2×56081647² = 6290302260465218, which contains 22 as substring.

It is a plaindrome in base 16.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (56081687) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28040823 + 28040824.

It is an arithmetic number, because the mean of its divisors is an integer number (28040824).

Almost surely, 2^56081647 is an apocalyptic number.

56081647 is a deficient number, since it is larger than the sum of its proper divisors (1).

56081647 is an equidigital number, since it uses as much as digits as its factorization.

56081647 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 56081647 is about 7488.7680562293. The cubic root of 56081647 is about 382.7720808981.

The spelling of 56081647 in words is "fifty-six million, eighty-one thousand, six hundred forty-seven".