53553440 has 48 divisors (see below), whose sum is σ = 126976248. Its totient is φ = 21344256.

The previous prime is 53553439. The next prime is 53553443. The reversal of 53553440 is 4435535.

It can be written as a sum of positive squares in 4 ways, for example, as 18079504 + 35473936 = 4252^2 + 5956^2 .

It is not an unprimeable number, because it can be changed into a prime (53553443) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68894 + ... + 69666.

Almost surely, 2^53553440 is an apocalyptic number.

It is an amenable number.

53553440 is an abundant number, since it is smaller than the sum of its proper divisors (73422808).

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

53553440 is a wasteful number, since it uses less digits than its factorization.

53553440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1221 (or 1213 counting only the distinct ones).

The product of its (nonzero) digits is 18000, while the sum is 29.

The square root of 53553440 is about 7318.0215905667. The cubic root of 53553440 is about 376.9315215913.

Adding to 53553440 its reverse (4435535), we get a palindrome (57988975).

The spelling of 53553440 in words is "fifty-three million, five hundred fifty-three thousand, four hundred forty".