82281049 has 4 divisors (see below), whose sum is σ = 82756836. Its totient is φ = 81805264.

The previous prime is 82281047. The next prime is 82281079. The reversal of 82281049 is 94018228.

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 47706649 + 34574400 = 6907^2 + 5880^2 .

It is a cyclic number.

It is not a de Polignac number, because 82281049 - 2¹ = 82281047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (82281041) 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 in 3 ways as a sum of consecutive naturals, for example, 237634 + ... + 237979.

It is an arithmetic number, because the mean of its divisors is an integer number (20689209).

Almost surely, 2^82281049 is an apocalyptic number.

It is an amenable number.

82281049 is a deficient number, since it is larger than the sum of its proper divisors (475787).

82281049 is a wasteful number, since it uses less digits than its factorization.

82281049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475786.

The product of its (nonzero) digits is 9216, while the sum is 34.

The square root of 82281049 is about 9070.8901988724. The cubic root of 82281049 is about 434.9439290039.

The spelling of 82281049 in words is "eighty-two million, two hundred eighty-one thousand, forty-nine".