55551000013 has 2 divisors, whose sum is σ = 55551000014. Its totient is φ = 55551000012.

The previous prime is 55550999989. The next prime is 55551000059. The reversal of 55551000013 is 31000015555.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 49712053444 + 5838946569 = 222962^2 + 76413^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55551000013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55551000613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27775500006 + 27775500007.

It is an arithmetic number, because the mean of its divisors is an integer number (27775500007).

Almost surely, 2^55551000013 is an apocalyptic number.

It is an amenable number.

55551000013 is a deficient number, since it is larger than the sum of its proper divisors (1).

55551000013 is an equidigital number, since it uses as much as digits as its factorization.

55551000013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1875, while the sum is 25.

Adding to 55551000013 its reverse (31000015555), we get a palindrome (86551015568).

The spelling of 55551000013 in words is "fifty-five billion, five hundred fifty-one million, thirteen", and thus it is an aban number.