551011009 has 2 divisors, whose sum is σ = 551011010. Its totient is φ = 551011008.

The previous prime is 551010997. The next prime is 551011061. The reversal of 551011009 is 900110155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 494083984 + 56927025 = 22228^2 + 7545^2 .

It is a cyclic number.

It is not a de Polignac number, because 551011009 - 2²⁹ = 14140097 is a prime.

It is a super-2 number, since 2×551011009² = 607226264078396162, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551011099) 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, 275505504 + 275505505.

It is an arithmetic number, because the mean of its divisors is an integer number (275505505).

Almost surely, 2^551011009 is an apocalyptic number.

It is an amenable number.

551011009 is a deficient number, since it is larger than the sum of its proper divisors (1).

551011009 is an equidigital number, since it uses as much as digits as its factorization.

551011009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 551011009 is about 23473.6236870237. The cubic root of 551011009 is about 819.8229882639.

The spelling of 551011009 in words is "five hundred fifty-one million, eleven thousand, nine".