515102020 has 48 divisors (see below), whose sum is σ = 1140023808. Its totient is φ = 195113600.

The previous prime is 515102017. The next prime is 515102039. The reversal of 515102020 is 20201515.

It is a junction number, because it is equal to n+sod(n) for n = 515101985 and 515102003.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40917 + ... + 52003.

It is an arithmetic number, because the mean of its divisors is an integer number (23750496).

Almost surely, 2^515102020 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 515102020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (570011904).

515102020 is an abundant number, since it is smaller than the sum of its proper divisors (624921788).

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

515102020 is a wasteful number, since it uses less digits than its factorization.

515102020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11220 (or 11218 counting only the distinct ones).

The product of its (nonzero) digits is 100, while the sum is 16.

The square root of 515102020 is about 22695.8590936761. The cubic root of 515102020 is about 801.6123835077.

Adding to 515102020 its reverse (20201515), we get a palindrome (535303535).

The spelling of 515102020 in words is "five hundred fifteen million, one hundred two thousand, twenty".