56403 has 8 divisors (see below), whose sum is σ = 83600. Its totient is φ = 37584.

The previous prime is 56401. The next prime is 56417. The reversal of 56403 is 30465.

It is a happy number.

It is not a de Polignac number, because 56403 - 2¹ = 56401 is a prime.

It is a Duffinian number.

It is a plaindrome in base 14.

It is a nialpdrome in base 9 and base 16.

It is not an unprimeable number, because it can be changed into a prime (56401) 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, 1018 + ... + 1071.

It is an arithmetic number, because the mean of its divisors is an integer number (10450).

2⁵⁶⁴⁰³ is an apocalyptic number.

56403 is a deficient number, since it is larger than the sum of its proper divisors (27197).

56403 is a wasteful number, since it uses less digits than its factorization.

56403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2098 (or 2092 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 18.

The square root of 56403 is about 237.4931577962. The cubic root of 56403 is about 38.3501795311.

Adding to 56403 its reverse (30465), we get a palindrome (86868).

The spelling of 56403 in words is "fifty-six thousand, four hundred three".