52521136521 has 16 divisors (see below), whose sum is σ = 81665520000. Its totient is φ = 30012077424.

The previous prime is 52521136487. The next prime is 52521136559. The reversal of 52521136521 is 12563112525.

It is not a de Polignac number, because 52521136521 - 2⁹ = 52521136009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (52521136021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25519446 + ... + 25521503.

It is an arithmetic number, because the mean of its divisors is an integer number (5104095000).

Almost surely, 2^52521136521 is an apocalyptic number.

It is an amenable number.

52521136521 is a deficient number, since it is larger than the sum of its proper divisors (29144383479).

52521136521 is an equidigital number, since it uses as much as digits as its factorization.

52521136521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51040973 (or 51040959 counting only the distinct ones).

The product of its digits is 18000, while the sum is 33.

The spelling of 52521136521 in words is "fifty-two billion, five hundred twenty-one million, one hundred thirty-six thousand, five hundred twenty-one".