52118550 has 72 divisors (see below), whose sum is σ = 152769240. Its totient is φ = 12633600.

The previous prime is 52118531. The next prime is 52118551. The reversal of 52118550 is 5581125.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52118551) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 315 + ... + 10214.

It is an arithmetic number, because the mean of its divisors is an integer number (2121795).

Almost surely, 2^52118550 is an apocalyptic number.

52118550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 52118550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76384620).

52118550 is an abundant number, since it is smaller than the sum of its proper divisors (100650690).

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

52118550 is a wasteful number, since it uses less digits than its factorization.

52118550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10558 (or 10550 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 27.

The square root of 52118550 is about 7219.3178348096. The cubic root of 52118550 is about 373.5345473224.

Adding to 52118550 its reverse (5581125), we get a palindrome (57699675).

The spelling of 52118550 in words is "fifty-two million, one hundred eighteen thousand, five hundred fifty".