523421513 has 2 divisors, whose sum is σ = 523421514. Its totient is φ = 523421512.

The previous prime is 523421477. The next prime is 523421533. The reversal of 523421513 is 315124325.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 426339904 + 97081609 = 20648^2 + 9853^2 .

It is a cyclic number.

It is not a de Polignac number, because 523421513 - 2¹⁰ = 523420489 is a prime.

It is not a weakly prime, because it can be changed into another prime (523421533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 261710756 + 261710757.

It is an arithmetic number, because the mean of its divisors is an integer number (261710757).

Almost surely, 2^523421513 is an apocalyptic number.

It is an amenable number.

523421513 is a deficient number, since it is larger than the sum of its proper divisors (1).

523421513 is an equidigital number, since it uses as much as digits as its factorization.

523421513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3600, while the sum is 26.

The square root of 523421513 is about 22878.4071342390. The cubic root of 523421513 is about 805.9050110028.

Adding to 523421513 its reverse (315124325), we get a palindrome (838545838).

The spelling of 523421513 in words is "five hundred twenty-three million, four hundred twenty-one thousand, five hundred thirteen".