521403212471 has 2 divisors, whose sum is σ = 521403212472. Its totient is φ = 521403212470.

The previous prime is 521403212461. The next prime is 521403212563. The reversal of 521403212471 is 174212304125.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521403212471 - 2¹⁰ = 521403211447 is a prime.

It is a super-3 number, since 3×521403212471³ (a number of 36 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (521403212461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260701606235 + 260701606236.

It is an arithmetic number, because the mean of its divisors is an integer number (260701606236).

Almost surely, 2^521403212471 is an apocalyptic number.

521403212471 is a deficient number, since it is larger than the sum of its proper divisors (1).

521403212471 is an equidigital number, since it uses as much as digits as its factorization.

521403212471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13440, while the sum is 32.

Adding to 521403212471 its reverse (174212304125), we get a palindrome (695615516596).

The spelling of 521403212471 in words is "five hundred twenty-one billion, four hundred three million, two hundred twelve thousand, four hundred seventy-one".