55562561 has 4 divisors (see below), whose sum is σ = 55623300. Its totient is φ = 55501824.

The previous prime is 55562543. The next prime is 55562569. The reversal of 55562561 is 16526555.

55562561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20976400 + 34586161 = 4580^2 + 5881^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55562561 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (55562569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28976 + ... + 30833.

It is an arithmetic number, because the mean of its divisors is an integer number (13905825).

Almost surely, 2^55562561 is an apocalyptic number.

It is an amenable number.

55562561 is a deficient number, since it is larger than the sum of its proper divisors (60739).

55562561 is an equidigital number, since it uses as much as digits as its factorization.

55562561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60738.

The product of its digits is 45000, while the sum is 35.

The square root of 55562561 is about 7454.0298496853. The cubic root of 55562561 is about 381.5874519744.

The spelling of 55562561 in words is "fifty-five million, five hundred sixty-two thousand, five hundred sixty-one".