55385047 has 4 divisors (see below), whose sum is σ = 55737976. Its totient is φ = 55032120.

The previous prime is 55385039. The next prime is 55385051. The reversal of 55385047 is 74058355.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 55385047 - 2³ = 55385039 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55384997 and 55385015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55385087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 176229 + ... + 176542.

It is an arithmetic number, because the mean of its divisors is an integer number (13934494).

Almost surely, 2^55385047 is an apocalyptic number.

55385047 is a deficient number, since it is larger than the sum of its proper divisors (352929).

55385047 is a wasteful number, since it uses less digits than its factorization.

55385047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 352928.

The product of its (nonzero) digits is 84000, while the sum is 37.

The square root of 55385047 is about 7442.1130735833. The cubic root of 55385047 is about 381.1806469924.

It can be divided in two parts, 5538 and 5047, that added together give a triangular number (10585 = T₁₄₅).

The spelling of 55385047 in words is "fifty-five million, three hundred eighty-five thousand, forty-seven".