515217130 has 16 divisors (see below), whose sum is σ = 981943560. Its totient is φ = 193964032.

The previous prime is 515217121. The next prime is 515217139. The reversal of 515217130 is 31712515.

It is an interprime number because it is at equal distance from previous prime (515217121) and next prime (515217139).

It can be written as a sum of positive squares in 4 ways, for example, as 413186929 + 102030201 = 20327^2 + 10101^2 .

It is a junction number, because it is equal to n+sod(n) for n = 515217095 and 515217104.

It is not an unprimeable number, because it can be changed into a prime (515217139) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1515175 + ... + 1515514.

Almost surely, 2^515217130 is an apocalyptic number.

515217130 is a deficient number, since it is larger than the sum of its proper divisors (466726430).

515217130 is a wasteful number, since it uses less digits than its factorization.

515217130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3030713.

The product of its (nonzero) digits is 1050, while the sum is 25.

The square root of 515217130 is about 22698.3948771714. The cubic root of 515217130 is about 801.6720912454.

Adding to 515217130 its reverse (31712515), we get a palindrome (546929645).

The spelling of 515217130 in words is "five hundred fifteen million, two hundred seventeen thousand, one hundred thirty".