52505550 has 192 divisors, whose sum is σ = 160704000. Its totient is φ = 12545280.

The previous prime is 52505513. The next prime is 52505587. The reversal of 52505550 is 5550525.

It is a happy number.

52505550 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (52505513) and next prime (52505587).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 589906 + ... + 589994.

It is an arithmetic number, because the mean of its divisors is an integer number (837000).

Almost surely, 2^52505550 is an apocalyptic number.

52505550 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 52505550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (80352000).

52505550 is an abundant number, since it is smaller than the sum of its proper divisors (108198450).

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

52505550 is a wasteful number, since it uses less digits than its factorization.

52505550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 6250, while the sum is 27.

The square root of 52505550 is about 7246.0713493589. The cubic root of 52505550 is about 374.4568135759.

The spelling of 52505550 in words is "fifty-two million, five hundred five thousand, five hundred fifty".