53315440 has 40 divisors (see below), whose sum is σ = 124331328. Its totient is φ = 21262080.

The previous prime is 53315429. The next prime is 53315459. The reversal of 53315440 is 4451335.

53315440 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×53315440² = 5685072284787200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 32889 + ... + 34471.

Almost surely, 2^53315440 is an apocalyptic number.

It is an amenable number.

53315440 is an abundant number, since it is smaller than the sum of its proper divisors (71015888).

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

53315440 is a wasteful number, since it uses less digits than its factorization.

53315440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2017 (or 2011 counting only the distinct ones).

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

The square root of 53315440 is about 7301.7422578450. The cubic root of 53315440 is about 376.3723111655.

Adding to 53315440 its reverse (4451335), we get a palindrome (57766775).

The spelling of 53315440 in words is "fifty-three million, three hundred fifteen thousand, four hundred forty".