515125020 has 96 divisors (see below), whose sum is σ = 1533676032. Its totient is φ = 128896768.

The previous prime is 515125019. The next prime is 515125033. The reversal of 515125020 is 20521515.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69619 + ... + 76661.

It is an arithmetic number, because the mean of its divisors is an integer number (15975792).

Almost surely, 2^515125020 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 515125020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (766838016).

515125020 is an abundant number, since it is smaller than the sum of its proper divisors (1018551012).

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

515125020 is a wasteful number, since it uses less digits than its factorization.

515125020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7131 (or 7129 counting only the distinct ones).

The product of its (nonzero) digits is 500, while the sum is 21.

The square root of 515125020 is about 22696.3657883812. The cubic root of 515125020 is about 801.6243143549.

Adding to 515125020 its reverse (20521515), we get a palindrome (535646535).

The spelling of 515125020 in words is "five hundred fifteen million, one hundred twenty-five thousand, twenty".