55647081 has 20 divisors (see below), whose sum is σ = 95003392. Its totient is φ = 31798008.

The previous prime is 55647079. The next prime is 55647167. The reversal of 55647081 is 18074655.

55647081 is a `hidden beast` number, since 5 + 5 + 647 + 0 + 8 + 1 = 666.

55647081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55647081 - 2¹ = 55647079 is a prime.

It is a super-2 number, since 2×55647081² = 6193195247641122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55647041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 48505 + ... + 49638.

Almost surely, 2^55647081 is an apocalyptic number.

It is an amenable number.

55647081 is a deficient number, since it is larger than the sum of its proper divisors (39356311).

55647081 is an equidigital number, since it uses as much as digits as its factorization.

55647081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98162 (or 98153 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The square root of 55647081 is about 7459.6971118136. The cubic root of 55647081 is about 381.7808401793.

The spelling of 55647081 in words is "fifty-five million, six hundred forty-seven thousand, eighty-one".