55213215055 has 16 divisors (see below), whose sum is σ = 66630885984. Its totient is φ = 43920938880.

The previous prime is 55213215011. The next prime is 55213215059. The reversal of 55213215055 is 55051231255.

It is not a de Polignac number, because 55213215055 - 2¹¹ = 55213213007 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 55213215055.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55213215059) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1155009 + ... + 1201861.

It is an arithmetic number, because the mean of its divisors is an integer number (4164430374).

Almost surely, 2^55213215055 is an apocalyptic number.

55213215055 is a deficient number, since it is larger than the sum of its proper divisors (11417670929).

55213215055 is a wasteful number, since it uses less digits than its factorization.

55213215055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48186.

The product of its (nonzero) digits is 37500, while the sum is 34.

The spelling of 55213215055 in words is "fifty-five billion, two hundred thirteen million, two hundred fifteen thousand, fifty-five".