521363 has 2 divisors, whose sum is σ = 521364. Its totient is φ = 521362.

The previous prime is 521359. The next prime is 521369. The reversal of 521363 is 363125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521363 - 2² = 521359 is a prime.

It is not a weakly prime, because it can be changed into another prime (521369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260681 + 260682.

It is an arithmetic number, because the mean of its divisors is an integer number (260682).

2⁵²¹³⁶³ is an apocalyptic number.

521363 is a deficient number, since it is larger than the sum of its proper divisors (1).

521363 is an equidigital number, since it uses as much as digits as its factorization.

521363 is an evil number, because the sum of its binary digits is even.

The product of its digits is 540, while the sum is 20.

The square root of 521363 is about 722.0547070687. The cubic root of 521363 is about 80.4847134792.

Adding to 521363 its reverse (363125), we get a palindrome (884488).

It can be divided in two parts, 52 and 1363, that multiplied together give a triangular number (70876 = T₃₇₆).

The spelling of 521363 in words is "five hundred twenty-one thousand, three hundred sixty-three".