521352143239 has 2 divisors, whose sum is σ = 521352143240. Its totient is φ = 521352143238.

The previous prime is 521352143231. The next prime is 521352143281. The reversal of 521352143239 is 932341253125.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521352143239 - 2³ = 521352143231 is a prime.

It is a super-2 number, since 2×521352143239² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521352143231) 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, 260676071619 + 260676071620.

It is an arithmetic number, because the mean of its divisors is an integer number (260676071620).

Almost surely, 2^521352143239 is an apocalyptic number.

521352143239 is a deficient number, since it is larger than the sum of its proper divisors (1).

521352143239 is an equidigital number, since it uses as much as digits as its factorization.

521352143239 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 194400, while the sum is 40.

The spelling of 521352143239 in words is "five hundred twenty-one billion, three hundred fifty-two million, one hundred forty-three thousand, two hundred thirty-nine".