215029313 has 2 divisors, whose sum is σ = 215029314. Its totient is φ = 215029312.

The previous prime is 215029291. The next prime is 215029333. The reversal of 215029313 is 313920512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 152571904 + 62457409 = 12352^2 + 7903^2 .

It is a cyclic number.

It is not a de Polignac number, because 215029313 - 2⁸ = 215029057 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (215029333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107514656 + 107514657.

It is an arithmetic number, because the mean of its divisors is an integer number (107514657).

Almost surely, 2^215029313 is an apocalyptic number.

It is an amenable number.

215029313 is a deficient number, since it is larger than the sum of its proper divisors (1).

215029313 is an equidigital number, since it uses as much as digits as its factorization.

215029313 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1620, while the sum is 26.

The square root of 215029313 is about 14663.8778295511. The cubic root of 215029313 is about 599.0998660141.

Adding to 215029313 its reverse (313920512), we get a palindrome (528949825).

The spelling of 215029313 in words is "two hundred fifteen million, twenty-nine thousand, three hundred thirteen".