268213243 has 2 divisors, whose sum is σ = 268213244. Its totient is φ = 268213242.

The previous prime is 268213241. The next prime is 268213249. The reversal of 268213243 is 342312862.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 268213243 - 2¹ = 268213241 is a prime.

Together with 268213241, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (268213241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134106621 + 134106622.

It is an arithmetic number, because the mean of its divisors is an integer number (134106622).

Almost surely, 2^268213243 is an apocalyptic number.

268213243 is a deficient number, since it is larger than the sum of its proper divisors (1).

268213243 is an equidigital number, since it uses as much as digits as its factorization.

268213243 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 31.

The square root of 268213243 is about 16377.2171934062. The cubic root of 268213243 is about 644.9015277429.

The spelling of 268213243 in words is "two hundred sixty-eight million, two hundred thirteen thousand, two hundred forty-three".