525322221 has 8 divisors (see below), whose sum is σ = 707650944. Its totient is φ = 346604160.

The previous prime is 525322207. The next prime is 525322319. The reversal of 525322221 is 122223525.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 525322221 - 2²¹ = 523225069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 525322191 and 525322200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (525322201) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 902325 + ... + 902906.

It is an arithmetic number, because the mean of its divisors is an integer number (88456368).

Almost surely, 2^525322221 is an apocalyptic number.

It is an amenable number.

525322221 is a deficient number, since it is larger than the sum of its proper divisors (182328723).

525322221 is a wasteful number, since it uses less digits than its factorization.

525322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1805331.

The product of its digits is 2400, while the sum is 24.

The square root of 525322221 is about 22919.9088348972. The cubic root of 525322221 is about 806.8793307165.

Adding to 525322221 its reverse (122223525), we get a palindrome (647545746).

The spelling of 525322221 in words is "five hundred twenty-five million, three hundred twenty-two thousand, two hundred twenty-one".