53391 has 12 divisors (see below), whose sum is σ = 78792. Its totient is φ = 31968.

The previous prime is 53381. The next prime is 53401. The reversal of 53391 is 19335.

53391 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (53381) and next prime (53401).

It is not a de Polignac number, because 53391 - 2⁵ = 53359 is a prime.

53391 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1425 + ... + 1461.

It is an arithmetic number, because the mean of its divisors is an integer number (6566).

2⁵³³⁹¹ is an apocalyptic number.

53391 is a deficient number, since it is larger than the sum of its proper divisors (25401).

53391 is a wasteful number, since it uses less digits than its factorization.

53391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 53 counting only the distinct ones).

The product of its digits is 405, while the sum is 21.

The square root of 53391 is about 231.0649259407. The cubic root of 53391 is about 37.6550028713.

Multiplying 53391 by its sum of digits (21), we get a palindrome (1121211).

It can be divided in two parts, 53 and 391, that added together give a palindrome (444).

The spelling of 53391 in words is "fifty-three thousand, three hundred ninety-one".