253550281 has 2 divisors, whose sum is σ = 253550282. Its totient is φ = 253550280.

The previous prime is 253550279. The next prime is 253550377. The reversal of 253550281 is 182055352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 199967881 + 53582400 = 14141^2 + 7320^2 .

It is a cyclic number.

It is not a de Polignac number, because 253550281 - 2¹ = 253550279 is a prime.

It is a super-2 number, since 2×253550281² = 128575489990357922, which contains 22 as substring.

Together with 253550279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (253550261) 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 as a sum of consecutive naturals, namely, 126775140 + 126775141.

It is an arithmetic number, because the mean of its divisors is an integer number (126775141).

Almost surely, 2^253550281 is an apocalyptic number.

It is an amenable number.

253550281 is a deficient number, since it is larger than the sum of its proper divisors (1).

253550281 is an equidigital number, since it uses as much as digits as its factorization.

253550281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 253550281 is about 15923.2622599768. The cubic root of 253550281 is about 632.9285683001.

The spelling of 253550281 in words is "two hundred fifty-three million, five hundred fifty thousand, two hundred eighty-one".