253871281 has 2 divisors, whose sum is σ = 253871282. Its totient is φ = 253871280.

The previous prime is 253871243. The next prime is 253871291. The reversal of 253871281 is 182178352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 146023056 + 107848225 = 12084^2 + 10385^2 .

It is a cyclic number.

It is not a de Polignac number, because 253871281 - 2⁷ = 253871153 is a prime.

It is a super-2 number, since 2×253871281² = 128901254633161922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 253871281.

It is not a weakly prime, because it can be changed into another prime (253871291) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126935640 + 126935641.

It is an arithmetic number, because the mean of its divisors is an integer number (126935641).

Almost surely, 2^253871281 is an apocalyptic number.

It is an amenable number.

253871281 is a deficient number, since it is larger than the sum of its proper divisors (1).

253871281 is an equidigital number, since it uses as much as digits as its factorization.

253871281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26880, while the sum is 37.

The square root of 253871281 is about 15933.3386645737. The cubic root of 253871281 is about 633.1955559638.

The spelling of 253871281 in words is "two hundred fifty-three million, eight hundred seventy-one thousand, two hundred eighty-one".