521328463 has 2 divisors, whose sum is σ = 521328464. Its totient is φ = 521328462.

The previous prime is 521328449. The next prime is 521328469. The reversal of 521328463 is 364823125.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 521328463 - 2⁹ = 521327951 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521328469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260664231 + 260664232.

It is an arithmetic number, because the mean of its divisors is an integer number (260664232).

Almost surely, 2^521328463 is an apocalyptic number.

521328463 is a deficient number, since it is larger than the sum of its proper divisors (1).

521328463 is an equidigital number, since it uses as much as digits as its factorization.

521328463 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34560, while the sum is 34.

The square root of 521328463 is about 22832.6183999996. The cubic root of 521328463 is about 804.8293623893.

The spelling of 521328463 in words is "five hundred twenty-one million, three hundred twenty-eight thousand, four hundred sixty-three".