268505213 has 2 divisors, whose sum is σ = 268505214. Its totient is φ = 268505212.

The previous prime is 268505183. The next prime is 268505221. The reversal of 268505213 is 312505862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146579449 + 121925764 = 12107^2 + 11042^2 .

It is a cyclic number.

It is not a de Polignac number, because 268505213 - 2²² = 264310909 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 268505213.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (268505233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134252606 + 134252607.

It is an arithmetic number, because the mean of its divisors is an integer number (134252607).

Almost surely, 2^268505213 is an apocalyptic number.

It is an amenable number.

268505213 is a deficient number, since it is larger than the sum of its proper divisors (1).

268505213 is an equidigital number, since it uses as much as digits as its factorization.

268505213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 32.

The square root of 268505213 is about 16386.1286764141. The cubic root of 268505213 is about 645.1354505910.

The spelling of 268505213 in words is "two hundred sixty-eight million, five hundred five thousand, two hundred thirteen".