281270881 has 2 divisors, whose sum is σ = 281270882. Its totient is φ = 281270880.

The previous prime is 281270867. The next prime is 281270897. The reversal of 281270881 is 188072182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161696656 + 119574225 = 12716^2 + 10935^2 .

It is a cyclic number.

It is not a de Polignac number, because 281270881 - 2¹¹ = 281268833 is a prime.

It is a super-2 number, since 2×281270881² = 158226616997032322, 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 281270881.

It is not a weakly prime, because it can be changed into another prime (281270081) 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, 140635440 + 140635441.

It is an arithmetic number, because the mean of its divisors is an integer number (140635441).

Almost surely, 2^281270881 is an apocalyptic number.

It is an amenable number.

281270881 is a deficient number, since it is larger than the sum of its proper divisors (1).

281270881 is an equidigital number, since it uses as much as digits as its factorization.

281270881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14336, while the sum is 37.

The square root of 281270881 is about 16771.1323708329. The cubic root of 281270881 is about 655.2015625809.

The spelling of 281270881 in words is "two hundred eighty-one million, two hundred seventy thousand, eight hundred eighty-one".