53221320355 has 24 divisors (see below), whose sum is σ = 75401486928. Its totient is φ = 35949912768.

The previous prime is 53221320353. The next prime is 53221320391. The reversal of 53221320355 is 55302312235.

53221320355 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 53221320355 - 2¹ = 53221320353 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53221320353) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1604704 + ... + 1637533.

It is an arithmetic number, because the mean of its divisors is an integer number (3141728622).

Almost surely, 2^53221320355 is an apocalyptic number.

53221320355 is a deficient number, since it is larger than the sum of its proper divisors (22180166573).

53221320355 is a wasteful number, since it uses less digits than its factorization.

53221320355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3242323 (or 3242316 counting only the distinct ones).

The product of its (nonzero) digits is 27000, while the sum is 31.

The spelling of 53221320355 in words is "fifty-three billion, two hundred twenty-one million, three hundred twenty thousand, three hundred fifty-five".