130055561 has 2 divisors, whose sum is σ = 130055562. Its totient is φ = 130055560.

The previous prime is 130055557. The next prime is 130055591. The reversal of 130055561 is 165550031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 96924025 + 33131536 = 9845^2 + 5756^2 .

It is an emirp because it is prime and its reverse (165550031) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 130055561 - 2² = 130055557 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 130055561.

It is not a weakly prime, because it can be changed into another prime (130055531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65027780 + 65027781.

It is an arithmetic number, because the mean of its divisors is an integer number (65027781).

Almost surely, 2^130055561 is an apocalyptic number.

It is an amenable number.

130055561 is a deficient number, since it is larger than the sum of its proper divisors (1).

130055561 is an equidigital number, since it uses as much as digits as its factorization.

130055561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2250, while the sum is 26.

The square root of 130055561 is about 11404.1905017410. The cubic root of 130055561 is about 506.6518610536.

The spelling of 130055561 in words is "one hundred thirty million, fifty-five thousand, five hundred sixty-one".