55206816 has 48 divisors (see below), whose sum is σ = 165622464. Its totient is φ = 15773184.

The previous prime is 55206743. The next prime is 55206817. The reversal of 55206816 is 61860255.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (55206817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40405 + ... + 41748.

It is an arithmetic number, because the mean of its divisors is an integer number (3450468).

Almost surely, 2^55206816 is an apocalyptic number.

55206816 is a gapful number since it is divisible by the number (56) formed by its first and last digit.

It is an amenable number.

55206816 is an abundant number, since it is smaller than the sum of its proper divisors (110415648).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

55206816 is a wasteful number, since it uses less digits than its factorization.

55206816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82173 (or 82165 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 55206816 is about 7430.1289356242. The cubic root of 55206816 is about 380.7713234296.

The spelling of 55206816 in words is "fifty-five million, two hundred six thousand, eight hundred sixteen".