551040613 has 2 divisors, whose sum is σ = 551040614. Its totient is φ = 551040612.

The previous prime is 551040599. The next prime is 551040649. The reversal of 551040613 is 316040155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 463842369 + 87198244 = 21537^2 + 9338^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551040613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551040683) 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, 275520306 + 275520307.

It is an arithmetic number, because the mean of its divisors is an integer number (275520307).

Almost surely, 2^551040613 is an apocalyptic number.

It is an amenable number.

551040613 is a deficient number, since it is larger than the sum of its proper divisors (1).

551040613 is an equidigital number, since it uses as much as digits as its factorization.

551040613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 551040613 is about 23474.2542586554. The cubic root of 551040613 is about 819.8376701273.

Adding to 551040613 its reverse (316040155), we get a palindrome (867080768).

The spelling of 551040613 in words is "five hundred fifty-one million, forty thousand, six hundred thirteen".