521825080217531 has 2 divisors, whose sum is σ = 521825080217532. Its totient is φ = 521825080217530.

The previous prime is 521825080217509. The next prime is 521825080217557. The reversal of 521825080217531 is 135712080528125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521825080217531 - 2¹⁴ = 521825080201147 is a prime.

It is a super-2 number, since 2×521825080217531² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 521825080217531.

It is not a weakly prime, because it can be changed into another prime (521825080217561) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260912540108765 + 260912540108766.

It is an arithmetic number, because the mean of its divisors is an integer number (260912540108766).

Almost surely, 2^{521825080217531} is an apocalyptic number.

521825080217531 is a deficient number, since it is larger than the sum of its proper divisors (1).

521825080217531 is an equidigital number, since it uses as much as digits as its factorization.

521825080217531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344000, while the sum is 50.

The spelling of 521825080217531 in words is "five hundred twenty-one trillion, eight hundred twenty-five billion, eighty million, two hundred seventeen thousand, five hundred thirty-one".