520163191 has 2 divisors, whose sum is σ = 520163192. Its totient is φ = 520163190.

The previous prime is 520163129. The next prime is 520163201. The reversal of 520163191 is 191361025.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 520163191 - 2²³ = 511774583 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520163491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260081595 + 260081596.

It is an arithmetic number, because the mean of its divisors is an integer number (260081596).

Almost surely, 2^520163191 is an apocalyptic number.

520163191 is a deficient number, since it is larger than the sum of its proper divisors (1).

520163191 is an equidigital number, since it uses as much as digits as its factorization.

520163191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1620, while the sum is 28.

The square root of 520163191 is about 22807.0864206720. The cubic root of 520163191 is about 804.2292642345.

The spelling of 520163191 in words is "five hundred twenty million, one hundred sixty-three thousand, one hundred ninety-one".