53547520 has 80 divisors (see below), whose sum is σ = 138350520. Its totient is φ = 19759104.

The previous prime is 53547511. The next prime is 53547521. The reversal of 53547520 is 2574535.

It can be written as a sum of positive squares in 4 ways, for example, as 47554816 + 5992704 = 6896^2 + 2448^2 .

It is a tau number, because it is divible by the number of its divisors (80).

It is not an unprimeable number, because it can be changed into a prime (53547521) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32476 + ... + 34084.

Almost surely, 2^53547520 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53547520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69175260).

53547520 is an abundant number, since it is smaller than the sum of its proper divisors (84803000).

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

53547520 is a wasteful number, since it uses less digits than its factorization.

53547520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1645 (or 1629 counting only the distinct ones).

The product of its (nonzero) digits is 21000, while the sum is 31.

The square root of 53547520 is about 7317.6170984823. The cubic root of 53547520 is about 376.9176319336.

The spelling of 53547520 in words is "fifty-three million, five hundred forty-seven thousand, five hundred twenty".