55018013 has 2 divisors, whose sum is σ = 55018014. Its totient is φ = 55018012.

The previous prime is 55017973. The next prime is 55018021. The reversal of 55018013 is 31081055.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44662489 + 10355524 = 6683^2 + 3218^2 .

It is a cyclic number.

It is not a de Polignac number, because 55018013 - 2⁸ = 55017757 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55018013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55018063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27509006 + 27509007.

It is an arithmetic number, because the mean of its divisors is an integer number (27509007).

Almost surely, 2^55018013 is an apocalyptic number.

It is an amenable number.

55018013 is a deficient number, since it is larger than the sum of its proper divisors (1).

55018013 is an equidigital number, since it uses as much as digits as its factorization.

55018013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 600, while the sum is 23.

The square root of 55018013 is about 7417.4128238895. The cubic root of 55018013 is about 380.3367582614.

Adding to 55018013 its reverse (31081055), we get a palindrome (86099068).

The spelling of 55018013 in words is "fifty-five million, eighteen thousand, thirteen".