55388247 has 8 divisors (see below), whose sum is σ = 73885680. Its totient is φ = 36908160.

The previous prime is 55388219. The next prime is 55388269. The reversal of 55388247 is 74288355.

55388247 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 55388247 - 2⁷ = 55388119 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a junction number, because it is equal to n+sod(n) for n = 55388199 and 55388208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55388647) 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 7 ways as a sum of consecutive naturals, for example, 8829 + ... + 13737.

It is an arithmetic number, because the mean of its divisors is an integer number (9235710).

Almost surely, 2^55388247 is an apocalyptic number.

55388247 is a deficient number, since it is larger than the sum of its proper divisors (18497433).

55388247 is a wasteful number, since it uses less digits than its factorization.

55388247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8673.

The product of its digits is 268800, while the sum is 42.

The square root of 55388247 is about 7442.3280631802. The cubic root of 55388247 is about 381.1879880507.

The spelling of 55388247 in words is "fifty-five million, three hundred eighty-eight thousand, two hundred forty-seven".