524402321 has 2 divisors, whose sum is σ = 524402322. Its totient is φ = 524402320.

The previous prime is 524402303. The next prime is 524402363. The reversal of 524402321 is 123204425.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 302064400 + 222337921 = 17380^2 + 14911^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-524402321 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (524408321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 262201160 + 262201161.

It is an arithmetic number, because the mean of its divisors is an integer number (262201161).

Almost surely, 2^524402321 is an apocalyptic number.

It is an amenable number.

524402321 is a deficient number, since it is larger than the sum of its proper divisors (1).

524402321 is an equidigital number, since it uses as much as digits as its factorization.

524402321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 524402321 is about 22899.8323356308. The cubic root of 524402321 is about 806.4080758417.

Adding to 524402321 its reverse (123204425), we get a palindrome (647606746).

The spelling of 524402321 in words is "five hundred twenty-four million, four hundred two thousand, three hundred twenty-one".