53033221 has 4 divisors (see below), whose sum is σ = 53140000. Its totient is φ = 52926444.

The previous prime is 53033207. The next prime is 53033261. The reversal of 53033221 is 12233035.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 12233035 = 5 ⋅2446607.

It is a cyclic number.

It is not a de Polignac number, because 53033221 - 2⁷ = 53033093 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 (53033261) 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 3 ways as a sum of consecutive naturals, for example, 52641 + ... + 53638.

It is an arithmetic number, because the mean of its divisors is an integer number (13285000).

Almost surely, 2^53033221 is an apocalyptic number.

It is an amenable number.

53033221 is a deficient number, since it is larger than the sum of its proper divisors (106779).

53033221 is a wasteful number, since it uses less digits than its factorization.

53033221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106778.

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 53033221 is about 7282.3911595025. The cubic root of 53033221 is about 375.7070417777.

Adding to 53033221 its reverse (12233035), we get a palindrome (65266256).

The spelling of 53033221 in words is "fifty-three million, thirty-three thousand, two hundred twenty-one".