55285847 has 4 divisors (see below), whose sum is σ = 55428360. Its totient is φ = 55143336.

The previous prime is 55285843. The next prime is 55285849. The reversal of 55285847 is 74858255.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74858255 = 5 ⋅14971651.

It is a cyclic number.

It is not a de Polignac number, because 55285847 - 2² = 55285843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 55285798 and 55285807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55285843) 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, 70673 + ... + 71450.

It is an arithmetic number, because the mean of its divisors is an integer number (13857090).

Almost surely, 2^55285847 is an apocalyptic number.

55285847 is a deficient number, since it is larger than the sum of its proper divisors (142513).

55285847 is a wasteful number, since it uses less digits than its factorization.

55285847 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142512.

The product of its digits is 448000, while the sum is 44.

The square root of 55285847 is about 7435.4453128242. The cubic root of 55285847 is about 380.9529337956.

The spelling of 55285847 in words is "fifty-five million, two hundred eighty-five thousand, eight hundred forty-seven".