515232397 has 2 divisors, whose sum is σ = 515232398. Its totient is φ = 515232396.

The previous prime is 515232359. The next prime is 515232449. The reversal of 515232397 is 793232515.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 267453316 + 247779081 = 16354^2 + 15741^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-515232397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (515232097) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 257616198 + 257616199.

It is an arithmetic number, because the mean of its divisors is an integer number (257616199).

Almost surely, 2^515232397 is an apocalyptic number.

It is an amenable number.

515232397 is a deficient number, since it is larger than the sum of its proper divisors (1).

515232397 is an equidigital number, since it uses as much as digits as its factorization.

515232397 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56700, while the sum is 37.

The square root of 515232397 is about 22698.7311759931. The cubic root of 515232397 is about 801.6800095942.

The spelling of 515232397 in words is "five hundred fifteen million, two hundred thirty-two thousand, three hundred ninety-seven".