53345221 has 4 divisors (see below), whose sum is σ = 53413792. Its totient is φ = 53276652.

The previous prime is 53345219. The next prime is 53345251. The reversal of 53345221 is 12254335.

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.

It is a cyclic number.

It is not a de Polignac number, because 53345221 - 2¹ = 53345219 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 (53345251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33105 + ... + 34678.

It is an arithmetic number, because the mean of its divisors is an integer number (13353448).

Almost surely, 2^53345221 is an apocalyptic number.

It is an amenable number.

53345221 is a deficient number, since it is larger than the sum of its proper divisors (68571).

53345221 is an equidigital number, since it uses as much as digits as its factorization.

53345221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68570.

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

The square root of 53345221 is about 7303.7812809530. The cubic root of 53345221 is about 376.4423762814.

Adding to 53345221 its reverse (12254335), we get a palindrome (65599556).

It can be divided in two parts, 533 and 45221, that added together give a palindrome (45754).

The spelling of 53345221 in words is "fifty-three million, three hundred forty-five thousand, two hundred twenty-one".