551230409 has 2 divisors, whose sum is σ = 551230410. Its totient is φ = 551230408.

The previous prime is 551230391. The next prime is 551230411. The reversal of 551230409 is 904032155.

551230409 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 278055625 + 273174784 = 16675^2 + 16528^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551230409 is a prime.

Together with 551230411, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (551230469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 275615204 + 275615205.

It is an arithmetic number, because the mean of its divisors is an integer number (275615205).

Almost surely, 2^551230409 is an apocalyptic number.

It is an amenable number.

551230409 is a deficient number, since it is larger than the sum of its proper divisors (1).

551230409 is an equidigital number, since it uses as much as digits as its factorization.

551230409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5400, while the sum is 29.

The square root of 551230409 is about 23478.2965523481. The cubic root of 551230409 is about 819.9317854221.

The spelling of 551230409 in words is "five hundred fifty-one million, two hundred thirty thousand, four hundred nine".