53056720 has 20 divisors (see below), whose sum is σ = 123357060. Its totient is φ = 21222656.

The previous prime is 53056691. The next prime is 53056771. The reversal of 53056720 is 2765035.

It can be written as a sum of positive squares in 2 ways, for example, as 19044496 + 34012224 = 4364^2 + 5832^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 331525 + ... + 331684.

It is an arithmetic number, because the mean of its divisors is an integer number (6167853).

Almost surely, 2^53056720 is an apocalyptic number.

It is an amenable number.

53056720 is an abundant number, since it is smaller than the sum of its proper divisors (70300340).

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

53056720 is a wasteful number, since it uses less digits than its factorization.

53056720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 663222 (or 663216 counting only the distinct ones).

The product of its (nonzero) digits is 6300, while the sum is 28.

The square root of 53056720 is about 7284.0043931892. The cubic root of 53056720 is about 375.7625254659.

The spelling of 53056720 in words is "fifty-three million, fifty-six thousand, seven hundred twenty".