53543221 has 8 divisors (see below), whose sum is σ = 54134784. Its totient is φ = 52955280.

The previous prime is 53543219. The next prime is 53543227. The reversal of 53543221 is 12234535.

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 53543221 - 2¹ = 53543219 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53543227) 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, 36916 + ... + 38338.

It is an arithmetic number, because the mean of its divisors is an integer number (6766848).

Almost surely, 2^53543221 is an apocalyptic number.

It is an amenable number.

53543221 is a deficient number, since it is larger than the sum of its proper divisors (591563).

53543221 is a wasteful number, since it uses less digits than its factorization.

53543221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1811.

The product of its digits is 3600, while the sum is 25.

The square root of 53543221 is about 7317.3233494222. The cubic root of 53543221 is about 376.9075448667.

Adding to 53543221 its reverse (12234535), we get a palindrome (65777756).

The spelling of 53543221 in words is "fifty-three million, five hundred forty-three thousand, two hundred twenty-one".