53221343 has 16 divisors (see below), whose sum is σ = 62899200. Its totient is φ = 44087136.

The previous prime is 53221331. The next prime is 53221361. The reversal of 53221343 is 34312235.

It is a cyclic number.

It is not a de Polignac number, because 53221343 - 2²⁰ = 52172767 is a prime.

It is a super-2 number, since 2×53221343² = 5665022701447298, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53221303) 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, 26333 + ... + 28281.

It is an arithmetic number, because the mean of its divisors is an integer number (3931200).

Almost surely, 2^53221343 is an apocalyptic number.

53221343 is a deficient number, since it is larger than the sum of its proper divisors (9677857).

53221343 is a wasteful number, since it uses less digits than its factorization.

53221343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086.

The product of its digits is 2160, while the sum is 23.

The square root of 53221343 is about 7295.2959501312. The cubic root of 53221343 is about 376.1507595794.

Adding to 53221343 its reverse (34312235), we get a palindrome (87533578).

The spelling of 53221343 in words is "fifty-three million, two hundred twenty-one thousand, three hundred forty-three".