5121518220 has 480 divisors, whose sum is σ = 20206032000. Its totient is φ = 1079059968.

The previous prime is 5121518183. The next prime is 5121518221. The reversal of 5121518220 is 228151215.

It is a happy number.

5121518220 is a `hidden beast` number, since 5 + 121 + 518 + 2 + 20 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (5121518221) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 7223226 + ... + 7223934.

It is an arithmetic number, because the mean of its divisors is an integer number (42095900).

Almost surely, 2^5121518220 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5121518220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10103016000).

5121518220 is an abundant number, since it is smaller than the sum of its proper divisors (15084513780).

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

5121518220 is a wasteful number, since it uses less digits than its factorization.

5121518220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 764 (or 739 counting only the distinct ones).

The product of its (nonzero) digits is 1600, while the sum is 27.

The square root of 5121518220 is about 71564.7833784187. The cubic root of 5121518220 is about 1723.7180948684.

Adding to 5121518220 its reverse (228151215), we get a palindrome (5349669435).

The spelling of 5121518220 in words is "five billion, one hundred twenty-one million, five hundred eighteen thousand, two hundred twenty".