551056009 has 6 divisors (see below), whose sum is σ = 641024394. Its totient is φ = 472333680.

The previous prime is 551056001. The next prime is 551056019. The reversal of 551056009 is 900650155.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 434847609 + 116208400 = 20853^2 + 10780^2 .

It is not a de Polignac number, because 551056009 - 2³ = 551056001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (551056001) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5622972 + ... + 5623069.

It is an arithmetic number, because the mean of its divisors is an integer number (106837399).

Almost surely, 2^551056009 is an apocalyptic number.

It is an amenable number.

551056009 is a deficient number, since it is larger than the sum of its proper divisors (89968385).

551056009 is a wasteful number, since it uses less digits than its factorization.

551056009 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11246055 (or 11246048 counting only the distinct ones).

The product of its (nonzero) digits is 6750, while the sum is 31.

The square root of 551056009 is about 23474.5821901051. The cubic root of 551056009 is about 819.8453054407.

The spelling of 551056009 in words is "five hundred fifty-one million, fifty-six thousand, nine".