30055552561 has 2 divisors, whose sum is σ = 30055552562. Its totient is φ = 30055552560.

The previous prime is 30055552531. The next prime is 30055552573. The reversal of 30055552561 is 16525555003.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29680742961 + 374809600 = 172281^2 + 19360^2 .

It is an emirp because it is prime and its reverse (16525555003) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30055552561 - 2²³ = 30047163953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 30055552561.

It is not a weakly prime, because it can be changed into another prime (30055552531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15027776280 + 15027776281.

It is an arithmetic number, because the mean of its divisors is an integer number (15027776281).

Almost surely, 2^30055552561 is an apocalyptic number.

It is an amenable number.

30055552561 is a deficient number, since it is larger than the sum of its proper divisors (1).

30055552561 is an equidigital number, since it uses as much as digits as its factorization.

30055552561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112500, while the sum is 37.

The spelling of 30055552561 in words is "thirty billion, fifty-five million, five hundred fifty-two thousand, five hundred sixty-one".