551215 has 8 divisors (see below), whose sum is σ = 756000. Its totient is φ = 377952.

The previous prime is 551207. The next prime is 551219. The reversal of 551215 is 512155.

551215 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 551215 - 2³ = 551207 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 551192 and 551201.

It is a congruent number.

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, 7840 + ... + 7909.

It is an arithmetic number, because the mean of its divisors is an integer number (94500).

2⁵⁵¹²¹⁵ is an apocalyptic number.

551215 is a deficient number, since it is larger than the sum of its proper divisors (204785).

551215 is a wasteful number, since it uses less digits than its factorization.

551215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15761.

The product of its digits is 250, while the sum is 19.

The square root of 551215 is about 742.4385496457. The cubic root of 551215 is about 81.9924145274.

Subtracting from 551215 its reverse (512155), we obtain a triangular number (39060 = T₂₇₉).

The spelling of 551215 in words is "five hundred fifty-one thousand, two hundred fifteen".