525220 has 12 divisors (see below), whose sum is σ = 1103004. Its totient is φ = 210080.

The previous prime is 525209. The next prime is 525221. The reversal of 525220 is 22525.

It can be written as a sum of positive squares in 2 ways, for example, as 65536 + 459684 = 256^2 + 678^2 .

It is a junction number, because it is equal to n+sod(n) for n = 525194 and 525203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525221) by changing a digit.

525220 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13111 + ... + 13150.

It is an arithmetic number, because the mean of its divisors is an integer number (91917).

2⁵²⁵²²⁰ is an apocalyptic number.

It is an amenable number.

525220 is an abundant number, since it is smaller than the sum of its proper divisors (577784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

525220 is a wasteful number, since it uses less digits than its factorization.

525220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26270 (or 26268 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 16.

The square root of 525220 is about 724.7206358315. The cubic root of 525220 is about 80.6826991181.

Adding to 525220 its reverse (22525), we get a palindrome (547745).

The spelling of 525220 in words is "five hundred twenty-five thousand, two hundred twenty".