551245321513 has 2 divisors, whose sum is σ = 551245321514. Its totient is φ = 551245321512.

The previous prime is 551245321387. The next prime is 551245321547. The reversal of 551245321513 is 315123542155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 336071800089 + 215173521424 = 579717^2 + 463868^2 .

It is a cyclic number.

It is not a de Polignac number, because 551245321513 - 2²¹ = 551243224361 is a prime.

It is not a weakly prime, because it can be changed into another prime (551245321553) 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, 275622660756 + 275622660757.

It is an arithmetic number, because the mean of its divisors is an integer number (275622660757).

Almost surely, 2^551245321513 is an apocalyptic number.

It is an amenable number.

551245321513 is a deficient number, since it is larger than the sum of its proper divisors (1).

551245321513 is an equidigital number, since it uses as much as digits as its factorization.

551245321513 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90000, while the sum is 37.

Adding to 551245321513 its reverse (315123542155), we get a palindrome (866368863668).

The spelling of 551245321513 in words is "five hundred fifty-one billion, two hundred forty-five million, three hundred twenty-one thousand, five hundred thirteen".