551217 has 8 divisors (see below), whose sum is σ = 752224. Its totient is φ = 358848.

The previous prime is 551207. The next prime is 551219. The reversal of 551217 is 712155.

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

It is not a de Polignac number, because 551217 - 2⁸ = 550961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 551193 and 551202.

It is not an unprimeable number, because it can be changed into a prime (551219) 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, 2008 + ... + 2265.

It is an arithmetic number, because the mean of its divisors is an integer number (94028).

2⁵⁵¹²¹⁷ is an apocalyptic number.

It is an amenable number.

551217 is a deficient number, since it is larger than the sum of its proper divisors (201007).

551217 is a wasteful number, since it uses less digits than its factorization.

551217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4319.

The product of its digits is 350, while the sum is 21.

The square root of 551217 is about 742.4398965573. The cubic root of 551217 is about 81.9925136929.

The spelling of 551217 in words is "five hundred fifty-one thousand, two hundred seventeen".