551305543121 has 2 divisors, whose sum is σ = 551305543122. Its totient is φ = 551305543120.

The previous prime is 551305543057. The next prime is 551305543147. The reversal of 551305543121 is 121345503155.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 394735758400 + 156569784721 = 628280^2 + 395689^2 .

It is a cyclic number.

It is not a de Polignac number, because 551305543121 - 2⁶ = 551305543057 is a prime.

It is not a weakly prime, because it can be changed into another prime (551305549121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275652771560 + 275652771561.

It is an arithmetic number, because the mean of its divisors is an integer number (275652771561).

Almost surely, 2^551305543121 is an apocalyptic number.

It is an amenable number.

551305543121 is a deficient number, since it is larger than the sum of its proper divisors (1).

551305543121 is an equidigital number, since it uses as much as digits as its factorization.

551305543121 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45000, while the sum is 35.

The spelling of 551305543121 in words is "five hundred fifty-one billion, three hundred five million, five hundred forty-three thousand, one hundred twenty-one".