53005550 has 24 divisors (see below), whose sum is σ = 106175496. Its totient is φ = 19571040.

The previous prime is 53005531. The next prime is 53005559. The reversal of 53005550 is 5550035.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53005559) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40124 + ... + 41423.

It is an arithmetic number, because the mean of its divisors is an integer number (4423979).

Almost surely, 2^53005550 is an apocalyptic number.

53005550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

53005550 is an abundant number, since it is smaller than the sum of its proper divisors (53169946).

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

53005550 is a wasteful number, since it uses less digits than its factorization.

53005550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81572 (or 81567 counting only the distinct ones).

The product of its (nonzero) digits is 1875, while the sum is 23.

The square root of 53005550 is about 7280.4910548671. The cubic root of 53005550 is about 375.6416865279.

Adding to 53005550 its reverse (5550035), we get a palindrome (58555585).

The spelling of 53005550 in words is "fifty-three million, five thousand, five hundred fifty".