253533281 has 2 divisors, whose sum is σ = 253533282. Its totient is φ = 253533280.

The previous prime is 253533277. The next prime is 253533317. The reversal of 253533281 is 182335352.

253533281 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 can be written as a sum of positive squares in only one way, i.e., 237653056 + 15880225 = 15416^2 + 3985^2 .

It is a cyclic number.

It is not a de Polignac number, because 253533281 - 2² = 253533277 is a prime.

It is a super-2 number, since 2×253533281² = 128558249149249922, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (253533271) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126766640 + 126766641.

It is an arithmetic number, because the mean of its divisors is an integer number (126766641).

Almost surely, 2^253533281 is an apocalyptic number.

It is an amenable number.

253533281 is a deficient number, since it is larger than the sum of its proper divisors (1).

253533281 is an equidigital number, since it uses as much as digits as its factorization.

253533281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21600, while the sum is 32.

The square root of 253533281 is about 15922.7284408169. The cubic root of 253533281 is about 632.9144224850.

The spelling of 253533281 in words is "two hundred fifty-three million, five hundred thirty-three thousand, two hundred eighty-one".