551249009 has 8 divisors (see below), whose sum is σ = 561005760. Its totient is φ = 541515600.

The previous prime is 551248991. The next prime is 551249077. The reversal of 551249009 is 900942155.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-551249009 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 551249009.

It is not an unprimeable number, because it can be changed into a prime (551239009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45794 + ... + 56564.

It is an arithmetic number, because the mean of its divisors is an integer number (70125720).

Almost surely, 2^551249009 is an apocalyptic number.

It is an amenable number.

551249009 is a deficient number, since it is larger than the sum of its proper divisors (9756751).

551249009 is a wasteful number, since it uses less digits than its factorization.

551249009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11671.

The product of its (nonzero) digits is 16200, while the sum is 35.

The square root of 551249009 is about 23478.6926595158. The cubic root of 551249009 is about 819.9410075546.

The spelling of 551249009 in words is "five hundred fifty-one million, two hundred forty-nine thousand, nine".