5251220550 has 96 divisors (see below), whose sum is σ = 14823113760. Its totient is φ = 1366156800.

The previous prime is 5251220539. The next prime is 5251220573. The reversal of 5251220550 is 550221525.

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 (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7914 + ... + 102786.

It is an arithmetic number, because the mean of its divisors is an integer number (154407435).

Almost surely, 2^5251220550 is an apocalyptic number.

5251220550 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 5251220550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7411556880).

5251220550 is an abundant number, since it is smaller than the sum of its proper divisors (9571893210).

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

5251220550 is a wasteful number, since it uses less digits than its factorization.

5251220550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94935 (or 94924 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 27.

The square root of 5251220550 is about 72465.3058366554. The cubic root of 5251220550 is about 1738.1479997631.

The spelling of 5251220550 in words is "five billion, two hundred fifty-one million, two hundred twenty thousand, five hundred fifty".