53440531 has 4 divisors (see below), whose sum is σ = 53455192. Its totient is φ = 53425872.

The previous prime is 53440511. The next prime is 53440553. The reversal of 53440531 is 13504435.

53440531 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 53440531 - 2⁹ = 53440019 is a prime.

It is a super-2 number, since 2×53440531² = 5711780707123922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 53440496 and 53440505.

It is not an unprimeable number, because it can be changed into a prime (53440511) 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, 2860 + ... + 10726.

It is an arithmetic number, because the mean of its divisors is an integer number (13363798).

Almost surely, 2^53440531 is an apocalyptic number.

53440531 is a deficient number, since it is larger than the sum of its proper divisors (14661).

53440531 is an equidigital number, since it uses as much as digits as its factorization.

53440531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14660.

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

The square root of 53440531 is about 7310.3030716927. The cubic root of 53440531 is about 376.6664349421. Note that the first 3 decimals are identical.

Adding to 53440531 its reverse (13504435), we get a palindrome (66944966).

The spelling of 53440531 in words is "fifty-three million, four hundred forty thousand, five hundred thirty-one".