515138353 has 2 divisors, whose sum is σ = 515138354. Its totient is φ = 515138352.

The previous prime is 515138347. The next prime is 515138357. The reversal of 515138353 is 353831515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 316412944 + 198725409 = 17788^2 + 14097^2 .

It is a cyclic number.

It is not a de Polignac number, because 515138353 - 2⁵ = 515138321 is a prime.

It is not a weakly prime, because it can be changed into another prime (515138357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257569176 + 257569177.

It is an arithmetic number, because the mean of its divisors is an integer number (257569177).

Almost surely, 2^515138353 is an apocalyptic number.

It is an amenable number.

515138353 is a deficient number, since it is larger than the sum of its proper divisors (1).

515138353 is an equidigital number, since it uses as much as digits as its factorization.

515138353 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27000, while the sum is 34.

The square root of 515138353 is about 22696.6595119194. The cubic root of 515138353 is about 801.6312304525.

Adding to 515138353 its reverse (353831515), we get a palindrome (868969868).

The spelling of 515138353 in words is "five hundred fifteen million, one hundred thirty-eight thousand, three hundred fifty-three".