515225 has 12 divisors (see below), whose sum is σ = 657324. Its totient is φ = 400320.

The previous prime is 515191. The next prime is 515227. The reversal of 515225 is 522515.

It can be written as a sum of positive squares in 6 ways, for example, as 12544 + 502681 = 112^2 + 709^2 .

It is not a de Polignac number, because 515225 - 2¹⁰ = 514201 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 515197 and 515206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515227) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 647 + ... + 1203.

It is an arithmetic number, because the mean of its divisors is an integer number (54777).

2⁵¹⁵²²⁵ is an apocalyptic number.

It is an amenable number.

515225 is a deficient number, since it is larger than the sum of its proper divisors (142099).

515225 is a wasteful number, since it uses less digits than its factorization.

515225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604 (or 599 counting only the distinct ones).

The product of its digits is 500, while the sum is 20.

The square root of 515225 is about 717.7917525299. The cubic root of 515225 is about 80.1676173102.

The spelling of 515225 in words is "five hundred fifteen thousand, two hundred twenty-five".