55520221206 has 16 divisors (see below), whose sum is σ = 112697763264. Its totient is φ = 18230520264.

The previous prime is 55520221201. The next prime is 55520221213. The reversal of 55520221206 is 60212202555.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55520221201) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 69054600 + ... + 69055403.

It is an arithmetic number, because the mean of its divisors is an integer number (7043610204).

Almost surely, 2^55520221206 is an apocalyptic number.

55520221206 is an abundant number, since it is smaller than the sum of its proper divisors (57177542058).

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

55520221206 is a wasteful number, since it uses less digits than its factorization.

55520221206 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 138110075.

The product of its (nonzero) digits is 12000, while the sum is 30.

The spelling of 55520221206 in words is "fifty-five billion, five hundred twenty million, two hundred twenty-one thousand, two hundred six".