55547855 has 16 divisors (see below), whose sum is σ = 72861984. Its totient is φ = 40318080.

The previous prime is 55547831. The next prime is 55547861. The reversal of 55547855 is 55874555.

It is not a de Polignac number, because 55547855 - 2¹⁰ = 55546831 is a prime.

It is a Duffinian 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, 54329 + ... + 55341.

It is an arithmetic number, because the mean of its divisors is an integer number (4553874).

Almost surely, 2^55547855 is an apocalyptic number.

55547855 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

55547855 is a deficient number, since it is larger than the sum of its proper divisors (17314129).

55547855 is a wasteful number, since it uses less digits than its factorization.

55547855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2026.

The product of its digits is 700000, while the sum is 44.

The square root of 55547855 is about 7453.0433381270. The cubic root of 55547855 is about 381.5537834986.

The spelling of 55547855 in words is "fifty-five million, five hundred forty-seven thousand, eight hundred fifty-five".