521426111 has 2 divisors, whose sum is σ = 521426112. Its totient is φ = 521426110.

The previous prime is 521426099. The next prime is 521426117. The reversal of 521426111 is 111624125.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 521426111 - 2¹⁰ = 521425087 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521426117) 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, 260713055 + 260713056.

It is an arithmetic number, because the mean of its divisors is an integer number (260713056).

Almost surely, 2^521426111 is an apocalyptic number.

521426111 is a deficient number, since it is larger than the sum of its proper divisors (1).

521426111 is an equidigital number, since it uses as much as digits as its factorization.

521426111 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 480, while the sum is 23.

The square root of 521426111 is about 22834.7566442036. The cubic root of 521426111 is about 804.8796090680.

The spelling of 521426111 in words is "five hundred twenty-one million, four hundred twenty-six thousand, one hundred eleven".