515311253 has 2 divisors, whose sum is σ = 515311254. Its totient is φ = 515311252.

The previous prime is 515311249. The next prime is 515311273. The reversal of 515311253 is 352113515.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 509269489 + 6041764 = 22567^2 + 2458^2 .

It is a cyclic number.

It is not a de Polignac number, because 515311253 - 2² = 515311249 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515311213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257655626 + 257655627.

It is an arithmetic number, because the mean of its divisors is an integer number (257655627).

Almost surely, 2^515311253 is an apocalyptic number.

It is an amenable number.

515311253 is a deficient number, since it is larger than the sum of its proper divisors (1).

515311253 is an equidigital number, since it uses as much as digits as its factorization.

515311253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2250, while the sum is 26.

The square root of 515311253 is about 22700.4681229265. The cubic root of 515311253 is about 801.7209063846.

Adding to 515311253 its reverse (352113515), we get a palindrome (867424768).

The spelling of 515311253 in words is "five hundred fifteen million, three hundred eleven thousand, two hundred fifty-three".