521960071 has 2 divisors, whose sum is σ = 521960072. Its totient is φ = 521960070.

The previous prime is 521960069. The next prime is 521960093. The reversal of 521960071 is 170069125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521960071 - 2¹ = 521960069 is a prime.

Together with 521960069, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521967071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260980035 + 260980036.

It is an arithmetic number, because the mean of its divisors is an integer number (260980036).

Almost surely, 2^521960071 is an apocalyptic number.

521960071 is a deficient number, since it is larger than the sum of its proper divisors (1).

521960071 is an equidigital number, since it uses as much as digits as its factorization.

521960071 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 521960071 is about 22846.4454784546. The cubic root of 521960071 is about 805.1542576960.

The spelling of 521960071 in words is "five hundred twenty-one million, nine hundred sixty thousand, seventy-one".