281049133 has 2 divisors, whose sum is σ = 281049134. Its totient is φ = 281049132.

The previous prime is 281049107. The next prime is 281049149. The reversal of 281049133 is 331940182.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 256576324 + 24472809 = 16018^2 + 4947^2 .

It is a cyclic number.

It is not a de Polignac number, because 281049133 - 2⁵ = 281049101 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 281049095 and 281049104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (281049173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 140524566 + 140524567.

It is an arithmetic number, because the mean of its divisors is an integer number (140524567).

Almost surely, 2^281049133 is an apocalyptic number.

It is an amenable number.

281049133 is a deficient number, since it is larger than the sum of its proper divisors (1).

281049133 is an equidigital number, since it uses as much as digits as its factorization.

281049133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 281049133 is about 16764.5200647081. The cubic root of 281049133 is about 655.0293349719.

It can be divided in two parts, 281049 and 133, that added together give a palindrome (281182).

The spelling of 281049133 in words is "two hundred eighty-one million, forty-nine thousand, one hundred thirty-three".