551089309 has 2 divisors, whose sum is σ = 551089310. Its totient is φ = 551089308.

The previous prime is 551089277. The next prime is 551089379. The reversal of 551089309 is 903980155.

551089309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 442471225 + 108618084 = 21035^2 + 10422^2 .

It is a cyclic number.

It is not a de Polignac number, because 551089309 - 2⁵ = 551089277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (551089379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275544654 + 275544655.

It is an arithmetic number, because the mean of its divisors is an integer number (275544655).

Almost surely, 2^551089309 is an apocalyptic number.

It is an amenable number.

551089309 is a deficient number, since it is larger than the sum of its proper divisors (1).

551089309 is an equidigital number, since it uses as much as digits as its factorization.

551089309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 48600, while the sum is 40.

The square root of 551089309 is about 23475.2914571896. The cubic root of 551089309 is about 819.8618193693.

It can be divided in two parts, 55 and 1089309, that multiplied together give a palindrome (59911995).

The spelling of 551089309 in words is "five hundred fifty-one million, eighty-nine thousand, three hundred nine".