281267028881 has 4 divisors (see below), whose sum is σ = 281463308772. Its totient is φ = 281070748992.

The previous prime is 281267028877. The next prime is 281267028901. The reversal of 281267028881 is 188820762182.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 118777418881 + 162489610000 = 344641^2 + 403100^2 .

It is a cyclic number.

It is not a de Polignac number, because 281267028881 - 2² = 281267028877 is a prime.

It is a super-2 number, since 2×281267028881² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (281267028811) 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 in 3 ways as a sum of consecutive naturals, for example, 98137796 + ... + 98140661.

It is an arithmetic number, because the mean of its divisors is an integer number (70365827193).

Almost surely, 2^281267028881 is an apocalyptic number.

It is an amenable number.

281267028881 is a deficient number, since it is larger than the sum of its proper divisors (196279891).

281267028881 is a wasteful number, since it uses less digits than its factorization.

281267028881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196279890.

The product of its (nonzero) digits is 1376256, while the sum is 53.

The spelling of 281267028881 in words is "two hundred eighty-one billion, two hundred sixty-seven million, twenty-eight thousand, eight hundred eighty-one".