215000249 has 2 divisors, whose sum is σ = 215000250. Its totient is φ = 215000248.

The previous prime is 215000239. The next prime is 215000267. The reversal of 215000249 is 942000512.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 191545600 + 23454649 = 13840^2 + 4843^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-215000249 is a prime.

It is not a weakly prime, because it can be changed into another prime (215000239) 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, 107500124 + 107500125.

It is an arithmetic number, because the mean of its divisors is an integer number (107500125).

Almost surely, 2^215000249 is an apocalyptic number.

It is an amenable number.

215000249 is a deficient number, since it is larger than the sum of its proper divisors (1).

215000249 is an equidigital number, since it uses as much as digits as its factorization.

215000249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 215000249 is about 14662.8867894422. The cubic root of 215000249 is about 599.0728727593.

The spelling of 215000249 in words is "two hundred fifteen million, two hundred forty-nine", and thus it is an aban number.