515015020 has 48 divisors (see below), whose sum is σ = 1169094528. Its totient is φ = 189446400.

The previous prime is 515014993. The next prime is 515015023. The reversal of 515015020 is 20510515.

It is not an unprimeable number, because it can be changed into a prime (515015023) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 68445 + ... + 75595.

It is an arithmetic number, because the mean of its divisors is an integer number (24356136).

Almost surely, 2^515015020 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 515015020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (584547264).

515015020 is an abundant number, since it is smaller than the sum of its proper divisors (654079508).

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

515015020 is a wasteful number, since it uses less digits than its factorization.

515015020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450 (or 7448 counting only the distinct ones).

The product of its (nonzero) digits is 250, while the sum is 19.

The square root of 515015020 is about 22693.9423635471. The cubic root of 515015020 is about 801.5672505687.

Adding to 515015020 its reverse (20510515), we get a palindrome (535525535).

The spelling of 515015020 in words is "five hundred fifteen million, fifteen thousand, twenty".