53221693 has 12 divisors (see below), whose sum is σ = 62495712. Its totient is φ = 45187800.

The previous prime is 53221691. The next prime is 53221697. The reversal of 53221693 is 39612235.

53221693 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 53221693 - 2¹ = 53221691 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53221691) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 168 + ... + 10318.

It is an arithmetic number, because the mean of its divisors is an integer number (5207976).

Almost surely, 2^53221693 is an apocalyptic number.

It is an amenable number.

53221693 is a deficient number, since it is larger than the sum of its proper divisors (9274019).

53221693 is a wasteful number, since it uses less digits than its factorization.

53221693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10272 (or 10265 counting only the distinct ones).

The product of its digits is 9720, while the sum is 31.

The square root of 53221693 is about 7295.3199381521. The cubic root of 53221693 is about 376.1515841388.

The spelling of 53221693 in words is "fifty-three million, two hundred twenty-one thousand, six hundred ninety-three".