52115550 has 24 divisors (see below), whose sum is σ = 129246936. Its totient is φ = 13897440.

The previous prime is 52115549. The next prime is 52115561. The reversal of 52115550 is 5551125.

It is a self number, because there is not a number n which added to its sum of digits gives 52115550.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 173569 + ... + 173868.

It is an arithmetic number, because the mean of its divisors is an integer number (5385289).

Almost surely, 2^52115550 is an apocalyptic number.

52115550 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

52115550 is an abundant number, since it is smaller than the sum of its proper divisors (77131386).

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

52115550 is a wasteful number, since it uses less digits than its factorization.

52115550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347452 (or 347447 counting only the distinct ones).

The product of its (nonzero) digits is 1250, while the sum is 24.

The square root of 52115550 is about 7219.1100559557. The cubic root of 52115550 is about 373.5273801676.

Adding to 52115550 its reverse (5551125), we get a palindrome (57666675).

The spelling of 52115550 in words is "fifty-two million, one hundred fifteen thousand, five hundred fifty".