215288713 has 2 divisors, whose sum is σ = 215288714. Its totient is φ = 215288712.

The previous prime is 215288701. The next prime is 215288719. The reversal of 215288713 is 317882512.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210743289 + 4545424 = 14517^2 + 2132^2 .

It is a cyclic number.

It is not a de Polignac number, because 215288713 - 2⁹ = 215288201 is a prime.

It is equal to p_11877373 and since 215288713 and 11877373 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (215288719) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107644356 + 107644357.

It is an arithmetic number, because the mean of its divisors is an integer number (107644357).

Almost surely, 2^215288713 is an apocalyptic number.

It is an amenable number.

215288713 is a deficient number, since it is larger than the sum of its proper divisors (1).

215288713 is an equidigital number, since it uses as much as digits as its factorization.

215288713 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 215288713 is about 14672.7200273160. The cubic root of 215288713 is about 599.3406766792.

The spelling of 215288713 in words is "two hundred fifteen million, two hundred eighty-eight thousand, seven hundred thirteen".