268211505 has 16 divisors (see below), whose sum is σ = 451725120. Its totient is φ = 135517248.

The previous prime is 268211491. The next prime is 268211507. The reversal of 268211505 is 505112862.

It is not a de Polignac number, because 268211505 - 2⁹ = 268210993 is a prime.

It is a super-2 number, since 2×268211505² = 143874822828730050, which contains 22 as substring.

It is a Curzon number.

It is a nialpdrome in base 16.

It is not an unprimeable number, because it can be changed into a prime (268211507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 470262 + ... + 470831.

It is an arithmetic number, because the mean of its divisors is an integer number (28232820).

Almost surely, 2^268211505 is an apocalyptic number.

It is an amenable number.

268211505 is a deficient number, since it is larger than the sum of its proper divisors (183513615).

268211505 is a wasteful number, since it uses less digits than its factorization.

268211505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 941120.

The product of its (nonzero) digits is 4800, while the sum is 30.

The square root of 268211505 is about 16377.1641318026. The cubic root of 268211505 is about 644.9001347700.

The spelling of 268211505 in words is "two hundred sixty-eight million, two hundred eleven thousand, five hundred five".