521314511 has 2 divisors, whose sum is σ = 521314512. Its totient is φ = 521314510.

The previous prime is 521314483. The next prime is 521314513. The reversal of 521314511 is 115413125.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-521314511 is a prime.

Together with 521314513, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521314513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260657255 + 260657256.

It is an arithmetic number, because the mean of its divisors is an integer number (260657256).

Almost surely, 2^521314511 is an apocalyptic number.

521314511 is a deficient number, since it is larger than the sum of its proper divisors (1).

521314511 is an equidigital number, since it uses as much as digits as its factorization.

521314511 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 600, while the sum is 23.

The square root of 521314511 is about 22832.3128701409. The cubic root of 521314511 is about 804.8221826039.

Adding to 521314511 its reverse (115413125), we get a palindrome (636727636).

The spelling of 521314511 in words is "five hundred twenty-one million, three hundred fourteen thousand, five hundred eleven".