52512533221 has 2 divisors, whose sum is σ = 52512533222. Its totient is φ = 52512533220.

The previous prime is 52512533219. The next prime is 52512533263. The reversal of 52512533221 is 12233521525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30840276996 + 21672256225 = 175614^2 + 147215^2 .

It is a cyclic number.

It is not a de Polignac number, because 52512533221 - 2¹ = 52512533219 is a prime.

It is a super-2 number, since 2×52512533221² (a number of 22 digits) contains 22 as substring.

Together with 52512533219, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52512533201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26256266610 + 26256266611.

It is an arithmetic number, because the mean of its divisors is an integer number (26256266611).

Almost surely, 2^52512533221 is an apocalyptic number.

It is an amenable number.

52512533221 is a deficient number, since it is larger than the sum of its proper divisors (1).

52512533221 is an equidigital number, since it uses as much as digits as its factorization.

52512533221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18000, while the sum is 31.

The spelling of 52512533221 in words is "fifty-two billion, five hundred twelve million, five hundred thirty-three thousand, two hundred twenty-one".