215422243 has 2 divisors, whose sum is σ = 215422244. Its totient is φ = 215422242.

The previous prime is 215422231. The next prime is 215422297. The reversal of 215422243 is 342224512.

215422243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215422243 - 2¹⁷ = 215291171 is a prime.

It is not a weakly prime, because it can be changed into another prime (215422223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 107711121 + 107711122.

It is an arithmetic number, because the mean of its divisors is an integer number (107711122).

Almost surely, 2^215422243 is an apocalyptic number.

215422243 is a deficient number, since it is larger than the sum of its proper divisors (1).

215422243 is an equidigital number, since it uses as much as digits as its factorization.

215422243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3840, while the sum is 25.

The square root of 215422243 is about 14677.2696030290. The cubic root of 215422243 is about 599.4645621341.

Adding to 215422243 its reverse (342224512), we get a palindrome (557646755).

The spelling of 215422243 in words is "two hundred fifteen million, four hundred twenty-two thousand, two hundred forty-three".