53389321 has 6 divisors (see below), whose sum is σ = 54551690. Its totient is φ = 52251216.

The previous prime is 53389313. The next prime is 53389327. The reversal of 53389321 is 12398335.

It can be written as a sum of positive squares in only one way, i.e., 53071225 + 318096 = 7285^2 + 564^2 .

It is not a de Polignac number, because 53389321 - 2³ = 53389313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53389327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9876 + ... + 14293.

Almost surely, 2^53389321 is an apocalyptic number.

It is an amenable number.

53389321 is a deficient number, since it is larger than the sum of its proper divisors (1162369).

53389321 is an equidigital number, since it uses as much as digits as its factorization.

53389321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24263 (or 24216 counting only the distinct ones).

The product of its digits is 19440, while the sum is 34.

The square root of 53389321 is about 7306.7996414299. The cubic root of 53389321 is about 376.5460815176.

The spelling of 53389321 in words is "fifty-three million, three hundred eighty-nine thousand, three hundred twenty-one".