551601013 has 2 divisors, whose sum is σ = 551601014. Its totient is φ = 551601012.

The previous prime is 551600993. The next prime is 551601049. The reversal of 551601013 is 310106155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 329531409 + 222069604 = 18153^2 + 14902^2 .

It is a cyclic number.

It is not a de Polignac number, because 551601013 - 2⁹ = 551600501 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551601613) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275800506 + 275800507.

It is an arithmetic number, because the mean of its divisors is an integer number (275800507).

Almost surely, 2^551601013 is an apocalyptic number.

It is an amenable number.

551601013 is a deficient number, since it is larger than the sum of its proper divisors (1).

551601013 is an equidigital number, since it uses as much as digits as its factorization.

551601013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 450, while the sum is 22.

The square root of 551601013 is about 23486.1877068204. The cubic root of 551601013 is about 820.1154968190.

Adding to 551601013 its reverse (310106155), we get a palindrome (861707168).

The spelling of 551601013 in words is "five hundred fifty-one million, six hundred one thousand, thirteen".