55521215055 has 24 divisors (see below), whose sum is σ = 96303119328. Its totient is φ = 29590900416.

The previous prime is 55521215051. The next prime is 55521215081. The reversal of 55521215055 is 55051212555.

55521215055 is a `hidden beast` number, since 5 + 552 + 1 + 2 + 1 + 50 + 55 = 666.

55521215055 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55521215055 - 2² = 55521215051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55521215051) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 359187 + ... + 489956.

It is an arithmetic number, because the mean of its divisors is an integer number (4012629972).

Almost surely, 2^55521215055 is an apocalyptic number.

55521215055 is a deficient number, since it is larger than the sum of its proper divisors (40781904273).

55521215055 is a wasteful number, since it uses less digits than its factorization.

55521215055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850607 (or 850604 counting only the distinct ones).

The product of its (nonzero) digits is 62500, while the sum is 36.

The spelling of 55521215055 in words is "fifty-five billion, five hundred twenty-one million, two hundred fifteen thousand, fifty-five".