53221403 has 8 divisors (see below), whose sum is σ = 54773376. Its totient is φ = 51681600.

The previous prime is 53221369. The next prime is 53221417. The reversal of 53221403 is 30412235.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 53221403 - 2¹⁰ = 53220379 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53221303) 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 7 ways as a sum of consecutive naturals, for example, 6233 + ... + 12053.

It is an arithmetic number, because the mean of its divisors is an integer number (6846672).

Almost surely, 2^53221403 is an apocalyptic number.

53221403 is a deficient number, since it is larger than the sum of its proper divisors (1551973).

53221403 is a wasteful number, since it uses less digits than its factorization.

53221403 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6085.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 53221403 is about 7295.3000623689. The cubic root of 53221403 is about 376.1509009327.

Adding to 53221403 its reverse (30412235), we get a palindrome (83633638).

The spelling of 53221403 in words is "fifty-three million, two hundred twenty-one thousand, four hundred three".