53555520 has 56 divisors (see below), whose sum is σ = 170041824. Its totient is φ = 14281216.

The previous prime is 53555503. The next prime is 53555521. The reversal of 53555520 is 2555535.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53555521) 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, 26934 + ... + 28853.

Almost surely, 2^53555520 is an apocalyptic number.

It is an amenable number.

53555520 is an abundant number, since it is smaller than the sum of its proper divisors (116486304).

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

53555520 is a wasteful number, since it uses less digits than its factorization.

53555520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55807 (or 55797 counting only the distinct ones).

The product of its (nonzero) digits is 18750, while the sum is 30.

The square root of 53555520 is about 7318.1637040995. The cubic root of 53555520 is about 376.9364014982.

The spelling of 53555520 in words is "fifty-three million, five hundred fifty-five thousand, five hundred twenty".