53224535521 has 4 divisors (see below), whose sum is σ = 53822564100. Its totient is φ = 52626506944.

The previous prime is 53224535503. The next prime is 53224535549. The reversal of 53224535521 is 12553542235.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17554925025 + 35669610496 = 132495^2 + 188864^2 .

It is a cyclic number.

It is not a de Polignac number, because 53224535521 - 2⁷ = 53224535393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53224535501) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299014156 + ... + 299014333.

It is an arithmetic number, because the mean of its divisors is an integer number (13455641025).

Almost surely, 2^53224535521 is an apocalyptic number.

It is an amenable number.

53224535521 is a deficient number, since it is larger than the sum of its proper divisors (598028579).

53224535521 is an equidigital number, since it uses as much as digits as its factorization.

53224535521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 598028578.

The product of its digits is 180000, while the sum is 37.

The spelling of 53224535521 in words is "fifty-three billion, two hundred twenty-four million, five hundred thirty-five thousand, five hundred twenty-one".