525234221 has 4 divisors (see below), whose sum is σ = 525283200. Its totient is φ = 525185244.

The previous prime is 525234191. The next prime is 525234251. The reversal of 525234221 is 122432525.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is an interprime number because it is at equal distance from previous prime (525234191) and next prime (525234251).

It is a cyclic number.

It is not a de Polignac number, because 525234221 - 2¹⁰ = 525233197 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 (525234251) 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, 701 + ... + 32418.

It is an arithmetic number, because the mean of its divisors is an integer number (131320800).

Almost surely, 2^525234221 is an apocalyptic number.

It is an amenable number.

525234221 is a deficient number, since it is larger than the sum of its proper divisors (48979).

525234221 is a wasteful number, since it uses less digits than its factorization.

525234221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48978.

The product of its digits is 4800, while the sum is 26.

The square root of 525234221 is about 22917.9890260904. The cubic root of 525234221 is about 806.8342730716.

Adding to 525234221 its reverse (122432525), we get a palindrome (647666746).

The spelling of 525234221 in words is "five hundred twenty-five million, two hundred thirty-four thousand, two hundred twenty-one".