527221 has 4 divisors (see below), whose sum is σ = 558252. Its totient is φ = 496192.

The previous prime is 527209. The next prime is 527237. The reversal of 527221 is 122725.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 148996 + 378225 = 386^2 + 615^2 .

It is a cyclic number.

It is not a de Polignac number, because 527221 - 2⁹ = 526709 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 15.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (527251) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15490 + ... + 15523.

It is an arithmetic number, because the mean of its divisors is an integer number (139563).

2⁵²⁷²²¹ is an apocalyptic number.

It is an amenable number.

527221 is a deficient number, since it is larger than the sum of its proper divisors (31031).

527221 is a wasteful number, since it uses less digits than its factorization.

527221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31030.

The product of its digits is 280, while the sum is 19.

The square root of 527221 is about 726.0998553918. The cubic root of 527221 is about 80.7850317827.

Adding to 527221 its reverse (122725), we get a palindrome (649946).

Subtracting from 527221 its reverse (122725), we obtain a square (404496 = 636²).

The spelling of 527221 in words is "five hundred twenty-seven thousand, two hundred twenty-one".