268553281 has 2 divisors, whose sum is σ = 268553282. Its totient is φ = 268553280.

The previous prime is 268553273. The next prime is 268553287. The reversal of 268553281 is 182355862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 264387600 + 4165681 = 16260^2 + 2041^2 .

It is a cyclic number.

It is not a de Polignac number, because 268553281 - 2³ = 268553273 is a prime.

It is a super-2 number, since 2×268553281² = 144241729471729922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (268553287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 134276640 + 134276641.

It is an arithmetic number, because the mean of its divisors is an integer number (134276641).

Almost surely, 2^268553281 is an apocalyptic number.

It is an amenable number.

268553281 is a deficient number, since it is larger than the sum of its proper divisors (1).

268553281 is an equidigital number, since it uses as much as digits as its factorization.

268553281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 115200, while the sum is 40.

The square root of 268553281 is about 16387.5953391582. The cubic root of 268553281 is about 645.1739458343.

The spelling of 268553281 in words is "two hundred sixty-eight million, five hundred fifty-three thousand, two hundred eighty-one".