525029221 has 4 divisors (see below), whose sum is σ = 526615744. Its totient is φ = 523442700.

The previous prime is 525029203. The next prime is 525029227. The reversal of 525029221 is 122920525.

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.

It is a cyclic number.

It is not a de Polignac number, because 525029221 - 2⁵ = 525029189 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 525029221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525029227) 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, 792765 + ... + 793426.

It is an arithmetic number, because the mean of its divisors is an integer number (131653936).

Almost surely, 2^525029221 is an apocalyptic number.

It is an amenable number.

525029221 is a deficient number, since it is larger than the sum of its proper divisors (1586523).

525029221 is a wasteful number, since it uses less digits than its factorization.

525029221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586522.

The product of its (nonzero) digits is 3600, while the sum is 28.

The square root of 525029221 is about 22913.5161204037. The cubic root of 525029221 is about 806.7292897182.

Adding to 525029221 its reverse (122920525), we get a palindrome (647949746).

The spelling of 525029221 in words is "five hundred twenty-five million, twenty-nine thousand, two hundred twenty-one".