55050561 has 12 divisors (see below), whose sum is σ = 81667092. Its totient is φ = 35708256.

The previous prime is 55050557. The next prime is 55050571. The reversal of 55050561 is 16505055.

55050561 is a `hidden beast` number, since 5 + 50 + 50 + 561 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 18870336 + 36180225 = 4344^2 + 6015^2 .

It is not a de Polignac number, because 55050561 - 2² = 55050557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55050521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82326 + ... + 82991.

It is an arithmetic number, because the mean of its divisors is an integer number (6805591).

Almost surely, 2^55050561 is an apocalyptic number.

It is an amenable number.

55050561 is a deficient number, since it is larger than the sum of its proper divisors (26616531).

55050561 is a wasteful number, since it uses less digits than its factorization.

55050561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165360 (or 165357 counting only the distinct ones).

The product of its (nonzero) digits is 3750, while the sum is 27.

The square root of 55050561 is about 7419.6065259554. The cubic root of 55050561 is about 380.4117443723.

It can be divided in two parts, 55050 and 561, that added together give a triangular number (55611 = T₃₃₃).

The spelling of 55050561 in words is "fifty-five million, fifty thousand, five hundred sixty-one".