551234209 has 2 divisors, whose sum is σ = 551234210. Its totient is φ = 551234208.

The previous prime is 551234183. The next prime is 551234237. The reversal of 551234209 is 902432155.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 522579600 + 28654609 = 22860^2 + 5353^2 .

It is a cyclic number.

It is not a de Polignac number, because 551234209 - 2⁷ = 551234081 is a prime.

It is not a weakly prime, because it can be changed into another prime (551234269) 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, 275617104 + 275617105.

It is an arithmetic number, because the mean of its divisors is an integer number (275617105).

Almost surely, 2^551234209 is an apocalyptic number.

It is an amenable number.

551234209 is a deficient number, since it is larger than the sum of its proper divisors (1).

551234209 is an equidigital number, since it uses as much as digits as its factorization.

551234209 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 551234209 is about 23478.3774780116. The cubic root of 551234209 is about 819.9336695305.

The spelling of 551234209 in words is "five hundred fifty-one million, two hundred thirty-four thousand, two hundred nine".