521275163 has 2 divisors, whose sum is σ = 521275164. Its totient is φ = 521275162.

The previous prime is 521275147. The next prime is 521275201. The reversal of 521275163 is 361572125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521275163 - 2⁴ = 521275147 is a prime.

It is not a weakly prime, because it can be changed into another prime (521175163) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260637581 + 260637582.

It is an arithmetic number, because the mean of its divisors is an integer number (260637582).

Almost surely, 2^521275163 is an apocalyptic number.

521275163 is a deficient number, since it is larger than the sum of its proper divisors (1).

521275163 is an equidigital number, since it uses as much as digits as its factorization.

521275163 is an evil number, because the sum of its binary digits is even.

The product of its digits is 12600, while the sum is 32.

The square root of 521275163 is about 22831.4511803346. The cubic root of 521275163 is about 804.8019331899.

The spelling of 521275163 in words is "five hundred twenty-one million, two hundred seventy-five thousand, one hundred sixty-three".