53223140 has 12 divisors (see below), whose sum is σ = 111768636. Its totient is φ = 21289248.

The previous prime is 53223139. The next prime is 53223143. The reversal of 53223140 is 4132235.

It is a happy number.

53223140 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 11723776 + 41499364 = 3424^2 + 6442^2 .

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2661157 = 53223140 / (5 + 3 + 2 + 2 + 3 + 1 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (53223143) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1330559 + ... + 1330598.

It is an arithmetic number, because the mean of its divisors is an integer number (9314053).

Almost surely, 2^53223140 is an apocalyptic number.

It is an amenable number.

53223140 is an abundant number, since it is smaller than the sum of its proper divisors (58545496).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

53223140 is a wasteful number, since it uses less digits than its factorization.

53223140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2661166 (or 2661164 counting only the distinct ones).

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

The square root of 53223140 is about 7295.4191106474. The cubic root of 53223140 is about 376.1549930646.

Adding to 53223140 its reverse (4132235), we get a palindrome (57355375).

The spelling of 53223140 in words is "fifty-three million, two hundred twenty-three thousand, one hundred forty".