561550055 has 16 divisors (see below), whose sum is σ = 760471200. Its totient is φ = 394316160.

The previous prime is 561550051. The next prime is 561550057. The reversal of 561550055 is 550055165.

561550055 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 561550055 - 2² = 561550051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561550051) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 174440 + ... + 177629.

It is an arithmetic number, because the mean of its divisors is an integer number (47529450).

Almost surely, 2^561550055 is an apocalyptic number.

561550055 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

561550055 is a deficient number, since it is larger than the sum of its proper divisors (198921145).

561550055 is a wasteful number, since it uses less digits than its factorization.

561550055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 352114.

The product of its (nonzero) digits is 18750, while the sum is 32.

The square root of 561550055 is about 23697.0473899176. The cubic root of 561550055 is about 825.0168616082.

The spelling of 561550055 in words is "five hundred sixty-one million, five hundred fifty thousand, fifty-five".