515330213 has 4 divisors (see below), whose sum is σ = 516236460. Its totient is φ = 514423968.

The previous prime is 515330209. The next prime is 515330219. The reversal of 515330213 is 312033515.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312033515 = 5 ⋅62406703.

It can be written as a sum of positive squares in 2 ways, for example, as 131836324 + 383493889 = 11482^2 + 19583^2 .

It is a cyclic number.

It is not a de Polignac number, because 515330213 - 2² = 515330209 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (515330219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 452270 + ... + 453407.

It is an arithmetic number, because the mean of its divisors is an integer number (129059115).

Almost surely, 2^515330213 is an apocalyptic number.

It is an amenable number.

515330213 is a deficient number, since it is larger than the sum of its proper divisors (906247).

515330213 is an equidigital number, since it uses as much as digits as its factorization.

515330213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 906246.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 515330213 is about 22700.8857316185. The cubic root of 515330213 is about 801.7307389158.

Adding to 515330213 its reverse (312033515), we get a palindrome (827363728).

The spelling of 515330213 in words is "five hundred fifteen million, three hundred thirty thousand, two hundred thirteen".