551678081 has 2 divisors, whose sum is σ = 551678082. Its totient is φ = 551678080.

The previous prime is 551678063. The next prime is 551678131. The reversal of 551678081 is 180876155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 286151056 + 265527025 = 16916^2 + 16295^2 .

It is a cyclic number.

It is not a de Polignac number, because 551678081 - 2¹⁸ = 551415937 is a prime.

It is a super-2 number, since 2×551678081² = 608697410111685122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (551678011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275839040 + 275839041.

It is an arithmetic number, because the mean of its divisors is an integer number (275839041).

Almost surely, 2^551678081 is an apocalyptic number.

It is an amenable number.

551678081 is a deficient number, since it is larger than the sum of its proper divisors (1).

551678081 is an equidigital number, since it uses as much as digits as its factorization.

551678081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 67200, while the sum is 41.

The square root of 551678081 is about 23487.8283585350. The cubic root of 551678081 is about 820.1536897134.

The spelling of 551678081 in words is "five hundred fifty-one million, six hundred seventy-eight thousand, eighty-one".