525336221 has 4 divisors (see below), whose sum is σ = 526279932. Its totient is φ = 524392512.

The previous prime is 525336167. The next prime is 525336233. The reversal of 525336221 is 122633525.

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 192820996 + 332515225 = 13886^2 + 18235^2 .

It is a cyclic number.

It is not a de Polignac number, because 525336221 - 2¹⁰ = 525335197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525336271) 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, 471020 + ... + 472133.

It is an arithmetic number, because the mean of its divisors is an integer number (131569983).

Almost surely, 2^525336221 is an apocalyptic number.

It is an amenable number.

525336221 is a deficient number, since it is larger than the sum of its proper divisors (943711).

525336221 is an equidigital number, since it uses as much as digits as its factorization.

525336221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 943710.

The product of its digits is 10800, while the sum is 29.

The square root of 525336221 is about 22920.2142441994. The cubic root of 525336221 is about 806.8864985142.

Adding to 525336221 its reverse (122633525), we get a palindrome (647969746).

The spelling of 525336221 in words is "five hundred twenty-five million, three hundred thirty-six thousand, two hundred twenty-one".