55239855 has 16 divisors (see below), whose sum is σ = 96418944. Its totient is φ = 26782880.

The previous prime is 55239841. The next prime is 55239869. The reversal of 55239855 is 55893255.

It is an interprime number because it is at equal distance from previous prime (55239841) and next prime (55239869).

It is not a de Polignac number, because 55239855 - 2⁴ = 55239839 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 congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 167229 + ... + 167558.

It is an arithmetic number, because the mean of its divisors is an integer number (6026184).

Almost surely, 2^55239855 is an apocalyptic number.

55239855 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55239855 is a deficient number, since it is larger than the sum of its proper divisors (41179089).

55239855 is a wasteful number, since it uses less digits than its factorization.

55239855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 334806.

The product of its digits is 270000, while the sum is 42.

The square root of 55239855 is about 7432.3519157801. The cubic root of 55239855 is about 380.8472669205.

The spelling of 55239855 in words is "fifty-five million, two hundred thirty-nine thousand, eight hundred fifty-five".