53403 has 8 divisors (see below), whose sum is σ = 81408. Its totient is φ = 30504.

The previous prime is 53401. The next prime is 53407. The reversal of 53403 is 30435.

53403 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 53403 - 2¹ = 53401 is a prime.

It is a plaindrome in base 14.

It is not an unprimeable number, because it can be changed into a prime (53401) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1251 + ... + 1292.

It is an arithmetic number, because the mean of its divisors is an integer number (10176).

2⁵³⁴⁰³ is an apocalyptic number.

53403 is a deficient number, since it is larger than the sum of its proper divisors (28005).

53403 is a wasteful number, since it uses less digits than its factorization.

53403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553.

The product of its (nonzero) digits is 180, while the sum is 15.

The square root of 53403 is about 231.0908912095. The cubic root of 53403 is about 37.6578237349.

Adding to 53403 its reverse (30435), we get a palindrome (83838).

The spelling of 53403 in words is "fifty-three thousand, four hundred three".