551020125613 has 2 divisors, whose sum is σ = 551020125614. Its totient is φ = 551020125612.

The previous prime is 551020125589. The next prime is 551020125647. The reversal of 551020125613 is 316521020155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 487967911209 + 63052214404 = 698547^2 + 251102^2 .

It is a cyclic number.

It is not a de Polignac number, because 551020125613 - 2⁵ = 551020125581 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551020125013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275510062806 + 275510062807.

It is an arithmetic number, because the mean of its divisors is an integer number (275510062807).

Almost surely, 2^551020125613 is an apocalyptic number.

It is an amenable number.

551020125613 is a deficient number, since it is larger than the sum of its proper divisors (1).

551020125613 is an equidigital number, since it uses as much as digits as its factorization.

551020125613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9000, while the sum is 31.

Adding to 551020125613 its reverse (316521020155), we get a palindrome (867541145768).

The spelling of 551020125613 in words is "five hundred fifty-one billion, twenty million, one hundred twenty-five thousand, six hundred thirteen".