53505550 has 36 divisors (see below), whose sum is σ = 115773840. Its totient is φ = 18343920.

The previous prime is 53505541. The next prime is 53505553. The reversal of 53505550 is 5550535.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53505553) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 8470 + ... + 13369.

It is an arithmetic number, because the mean of its divisors is an integer number (3215940).

Almost surely, 2^53505550 is an apocalyptic number.

53505550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

53505550 is an abundant number, since it is smaller than the sum of its proper divisors (62268290).

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

53505550 is a wasteful number, since it uses less digits than its factorization.

53505550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21865 (or 21853 counting only the distinct ones).

The product of its (nonzero) digits is 9375, while the sum is 28.

The square root of 53505550 is about 7314.7487995146. The cubic root of 53505550 is about 376.8191314628.

The spelling of 53505550 in words is "fifty-three million, five hundred five thousand, five hundred fifty".