513631273 has 2 divisors, whose sum is σ = 513631274. Its totient is φ = 513631272.

The previous prime is 513631247. The next prime is 513631277. The reversal of 513631273 is 372136315.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 507736089 + 5895184 = 22533^2 + 2428^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513631273 is a prime.

It is not a weakly prime, because it can be changed into another prime (513631277) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256815636 + 256815637.

It is an arithmetic number, because the mean of its divisors is an integer number (256815637).

Almost surely, 2^513631273 is an apocalyptic number.

It is an amenable number.

513631273 is a deficient number, since it is larger than the sum of its proper divisors (1).

513631273 is an equidigital number, since it uses as much as digits as its factorization.

513631273 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11340, while the sum is 31.

The square root of 513631273 is about 22663.4347132115. The cubic root of 513631273 is about 800.8487206274.

Adding to 513631273 its reverse (372136315), we get a palindrome (885767588).

The spelling of 513631273 in words is "five hundred thirteen million, six hundred thirty-one thousand, two hundred seventy-three".