53204403 has 16 divisors (see below), whose sum is σ = 81912320. Its totient is φ = 30087936.

The previous prime is 53204369. The next prime is 53204413. The reversal of 53204403 is 30440235.

It is a happy number.

It is not a de Polignac number, because 53204403 - 2¹⁰ = 53203379 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 53204403.

It is not an unprimeable number, because it can be changed into a prime (53204413) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11023 + ... + 15096.

It is an arithmetic number, because the mean of its divisors is an integer number (5119520).

Almost surely, 2^53204403 is an apocalyptic number.

53204403 is a deficient number, since it is larger than the sum of its proper divisors (28707917).

53204403 is a wasteful number, since it uses less digits than its factorization.

53204403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26226.

The product of its (nonzero) digits is 1440, while the sum is 21.

The square root of 53204403 is about 7294.1348356059. The cubic root of 53204403 is about 376.1108465816.

Adding to 53204403 its reverse (30440235), we get a palindrome (83644638).

The spelling of 53204403 in words is "fifty-three million, two hundred four thousand, four hundred three".