53521443 has 12 divisors (see below), whose sum is σ = 79974960. Its totient is φ = 34450416.

The previous prime is 53521439. The next prime is 53521451. The reversal of 53521443 is 34412535.

It is not a de Polignac number, because 53521443 - 2² = 53521439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (53521453) 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 11 ways as a sum of consecutive naturals, for example, 102271 + ... + 102792.

It is an arithmetic number, because the mean of its divisors is an integer number (6664580).

Almost surely, 2^53521443 is an apocalyptic number.

53521443 is a deficient number, since it is larger than the sum of its proper divisors (26453517).

53521443 is a wasteful number, since it uses less digits than its factorization.

53521443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 205098 (or 205095 counting only the distinct ones).

The product of its digits is 7200, while the sum is 27.

The square root of 53521443 is about 7315.8350856208. The cubic root of 53521443 is about 376.8564372102.

Adding to 53521443 its reverse (34412535), we get a palindrome (87933978).

The spelling of 53521443 in words is "fifty-three million, five hundred twenty-one thousand, four hundred forty-three".