53421143 has 4 divisors (see below), whose sum is σ = 54097440. Its totient is φ = 52744848.

The previous prime is 53421139. The next prime is 53421163. The reversal of 53421143 is 34112435.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 53421143 - 2² = 53421139 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 (53421133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 338030 + ... + 338187.

It is an arithmetic number, because the mean of its divisors is an integer number (13524360).

Almost surely, 2^53421143 is an apocalyptic number.

53421143 is a deficient number, since it is larger than the sum of its proper divisors (676297).

53421143 is an equidigital number, since it uses as much as digits as its factorization.

53421143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676296.

The product of its digits is 1440, while the sum is 23.

The square root of 53421143 is about 7308.9768777853. The cubic root of 53421143 is about 376.6208784327.

Adding to 53421143 its reverse (34112435), we get a palindrome (87533578).

The spelling of 53421143 in words is "fifty-three million, four hundred twenty-one thousand, one hundred forty-three".