55487855 has 4 divisors (see below), whose sum is σ = 66585432. Its totient is φ = 44390280.

The previous prime is 55487843. The next prime is 55487863. The reversal of 55487855 is 55878455.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55878455 = 5 ⋅11175691.

It is not a de Polignac number, because 55487855 - 2⁶ = 55487791 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5548781 + ... + 5548790.

It is an arithmetic number, because the mean of its divisors is an integer number (16646358).

Almost surely, 2^55487855 is an apocalyptic number.

55487855 is a deficient number, since it is larger than the sum of its proper divisors (11097577).

55487855 is a wasteful number, since it uses less digits than its factorization.

55487855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11097576.

The product of its digits is 1120000, while the sum is 47.

The square root of 55487855 is about 7449.0170492488. The cubic root of 55487855 is about 381.4163556017.

The spelling of 55487855 in words is "fifty-five million, four hundred eighty-seven thousand, eight hundred fifty-five".