2180300561 has 2 divisors, whose sum is σ = 2180300562. Its totient is φ = 2180300560.

The previous prime is 2180300543. The next prime is 2180300579. The reversal of 2180300561 is 1650030812.

2180300561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (2180300543) and next prime (2180300579).

It can be written as a sum of positive squares in only one way, i.e., 1457712400 + 722588161 = 38180^2 + 26881^2 .

It is a cyclic number.

It is not a de Polignac number, because 2180300561 - 2³⁰ = 1106558737 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2180300561.

It is not a weakly prime, because it can be changed into another prime (2180300581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090150280 + 1090150281.

It is an arithmetic number, because the mean of its divisors is an integer number (1090150281).

Almost surely, 2^2180300561 is an apocalyptic number.

It is an amenable number.

2180300561 is a deficient number, since it is larger than the sum of its proper divisors (1).

2180300561 is an equidigital number, since it uses as much as digits as its factorization.

2180300561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 26.

The square root of 2180300561 is about 46693.6886634586. The cubic root of 2180300561 is about 1296.6978442803.

The spelling of 2180300561 in words is "two billion, one hundred eighty million, three hundred thousand, five hundred sixty-one".