55520240513 has 2 divisors, whose sum is σ = 55520240514. Its totient is φ = 55520240512.

The previous prime is 55520240509. The next prime is 55520240521. The reversal of 55520240513 is 31504202555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47813507569 + 7706732944 = 218663^2 + 87788^2 .

It is a cyclic number.

It is not a de Polignac number, because 55520240513 - 2² = 55520240509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55520240513.

It is not a weakly prime, because it can be changed into another prime (55520240533) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27760120256 + 27760120257.

It is an arithmetic number, because the mean of its divisors is an integer number (27760120257).

Almost surely, 2^55520240513 is an apocalyptic number.

It is an amenable number.

55520240513 is a deficient number, since it is larger than the sum of its proper divisors (1).

55520240513 is an equidigital number, since it uses as much as digits as its factorization.

55520240513 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 30000, while the sum is 32.

The spelling of 55520240513 in words is "fifty-five billion, five hundred twenty million, two hundred forty thousand, five hundred thirteen".