525422321 has 2 divisors, whose sum is σ = 525422322. Its totient is φ = 525422320.

The previous prime is 525422309. The next prime is 525422357. The reversal of 525422321 is 123224525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 520752400 + 4669921 = 22820^2 + 2161^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-525422321 is a prime.

It is not a weakly prime, because it can be changed into another prime (525422221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262711160 + 262711161.

It is an arithmetic number, because the mean of its divisors is an integer number (262711161).

Almost surely, 2^525422321 is an apocalyptic number.

It is an amenable number.

525422321 is a deficient number, since it is larger than the sum of its proper divisors (1).

525422321 is an equidigital number, since it uses as much as digits as its factorization.

525422321 is an odious number, because the sum of its binary digits is odd.

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

The square root of 525422321 is about 22922.0924219409. The cubic root of 525422321 is about 806.9305776707.

Adding to 525422321 its reverse (123224525), we get a palindrome (648646846).

The spelling of 525422321 in words is "five hundred twenty-five million, four hundred twenty-two thousand, three hundred twenty-one".