55285879 has 4 divisors (see below), whose sum is σ = 60311880. Its totient is φ = 50259880.

The previous prime is 55285849. The next prime is 55285913. The reversal of 55285879 is 97858255.

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

It is not a de Polignac number, because 55285879 - 2⁹ = 55285367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55285849) 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, 2512984 + ... + 2513005.

It is an arithmetic number, because the mean of its divisors is an integer number (15077970).

Almost surely, 2^55285879 is an apocalyptic number.

55285879 is a deficient number, since it is larger than the sum of its proper divisors (5026001).

55285879 is a wasteful number, since it uses less digits than its factorization.

55285879 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5026000.

The product of its digits is 1008000, while the sum is 49.

The square root of 55285879 is about 7435.4474646789. The cubic root of 55285879 is about 380.9530072953.

The spelling of 55285879 in words is "fifty-five million, two hundred eighty-five thousand, eight hundred seventy-nine".