515961497 has 2 divisors, whose sum is σ = 515961498. Its totient is φ = 515961496.

The previous prime is 515961463. The next prime is 515961499. The reversal of 515961497 is 794169515.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 504271936 + 11689561 = 22456^2 + 3419^2 .

It is a cyclic number.

It is not a de Polignac number, because 515961497 - 2²⁰ = 514912921 is a prime.

Together with 515961499, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (515961499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257980748 + 257980749.

It is an arithmetic number, because the mean of its divisors is an integer number (257980749).

Almost surely, 2^515961497 is an apocalyptic number.

It is an amenable number.

515961497 is a deficient number, since it is larger than the sum of its proper divisors (1).

515961497 is an equidigital number, since it uses as much as digits as its factorization.

515961497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 340200, while the sum is 47.

The square root of 515961497 is about 22714.7858673596. The cubic root of 515961497 is about 802.0579810404.

The spelling of 515961497 in words is "five hundred fifteen million, nine hundred sixty-one thousand, four hundred ninety-seven".