53043221 has 32 divisors (see below), whose sum is σ = 70281216. Its totient is φ = 38808000.

The previous prime is 53043191. The next prime is 53043239. The reversal of 53043221 is 12234035.

It is a happy number.

It is not a de Polignac number, because 53043221 - 2⁶ = 53043157 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53043193 and 53043202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53043271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 107786 + ... + 108276.

It is an arithmetic number, because the mean of its divisors is an integer number (2196288).

Almost surely, 2^53043221 is an apocalyptic number.

It is an amenable number.

53043221 is a deficient number, since it is larger than the sum of its proper divisors (17237995).

53043221 is a wasteful number, since it uses less digits than its factorization.

53043221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 593.

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

The square root of 53043221 is about 7283.0777148126. The cubic root of 53043221 is about 375.7306548654.

Adding to 53043221 its reverse (12234035), we get a palindrome (65277256).

The spelling of 53043221 in words is "fifty-three million, forty-three thousand, two hundred twenty-one".