53440223421 has 32 divisors (see below), whose sum is σ = 77338558080. Its totient is φ = 32627810304.

The previous prime is 53440223371. The next prime is 53440223453. The reversal of 53440223421 is 12432204435.

It is not a de Polignac number, because 53440223421 - 2¹⁸ = 53439961277 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53440223021) 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 31 ways as a sum of consecutive naturals, for example, 12319765 + ... + 12324101.

It is an arithmetic number, because the mean of its divisors is an integer number (2416829940).

Almost surely, 2^53440223421 is an apocalyptic number.

It is an amenable number.

53440223421 is a deficient number, since it is larger than the sum of its proper divisors (23898334659).

53440223421 is a wasteful number, since it uses less digits than its factorization.

53440223421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6765.

The product of its (nonzero) digits is 23040, while the sum is 30.

Adding to 53440223421 its reverse (12432204435), we get a palindrome (65872427856).

The spelling of 53440223421 in words is "fifty-three billion, four hundred forty million, two hundred twenty-three thousand, four hundred twenty-one".