521252464939 has 2 divisors, whose sum is σ = 521252464940. Its totient is φ = 521252464938.

The previous prime is 521252464913. The next prime is 521252464949. The reversal of 521252464939 is 939464252125.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 521252464939 - 2¹¹ = 521252462891 is a prime.

It is not a weakly prime, because it can be changed into another prime (521252464949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260626232469 + 260626232470.

It is an arithmetic number, because the mean of its divisors is an integer number (260626232470).

Almost surely, 2^521252464939 is an apocalyptic number.

521252464939 is a deficient number, since it is larger than the sum of its proper divisors (1).

521252464939 is an equidigital number, since it uses as much as digits as its factorization.

521252464939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 52.

The spelling of 521252464939 in words is "five hundred twenty-one billion, two hundred fifty-two million, four hundred sixty-four thousand, nine hundred thirty-nine".