53365520 has 120 divisors (see below), whose sum is σ = 141121176. Its totient is φ = 18653184.

The previous prime is 53365513. The next prime is 53365531. The reversal of 53365520 is 2556335.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 541696 + 52823824 = 736^2 + 7268^2 .

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 23 ways as a sum of consecutive naturals, for example, 550112 + ... + 550208.

Almost surely, 2^53365520 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 53365520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70560588).

53365520 is an abundant number, since it is smaller than the sum of its proper divisors (87755656).

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

53365520 is a wasteful number, since it uses less digits than its factorization.

53365520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 140 counting only the distinct ones).

The product of its (nonzero) digits is 13500, while the sum is 29.

The square root of 53365520 is about 7305.1707714468. The cubic root of 53365520 is about 376.4901183572.

The spelling of 53365520 in words is "fifty-three million, three hundred sixty-five thousand, five hundred twenty".