521543339131 has 2 divisors, whose sum is σ = 521543339132. Its totient is φ = 521543339130.

The previous prime is 521543339089. The next prime is 521543339153. The reversal of 521543339131 is 131933345125.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 521543339131 - 2¹¹ = 521543337083 is a prime.

It is a super-2 number, since 2×521543339131² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (521543339831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260771669565 + 260771669566.

It is an arithmetic number, because the mean of its divisors is an integer number (260771669566).

Almost surely, 2^521543339131 is an apocalyptic number.

521543339131 is a deficient number, since it is larger than the sum of its proper divisors (1).

521543339131 is an equidigital number, since it uses as much as digits as its factorization.

521543339131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145800, while the sum is 40.

The spelling of 521543339131 in words is "five hundred twenty-one billion, five hundred forty-three million, three hundred thirty-nine thousand, one hundred thirty-one".