2281725161 has 2 divisors, whose sum is σ = 2281725162. Its totient is φ = 2281725160.

The previous prime is 2281725079. The next prime is 2281725203. The reversal of 2281725161 is 1615271822.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1542918400 + 738806761 = 39280^2 + 27181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2281725161 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (2281725961) 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, 1140862580 + 1140862581.

It is an arithmetic number, because the mean of its divisors is an integer number (1140862581).

Almost surely, 2^2281725161 is an apocalyptic number.

It is an amenable number.

2281725161 is a deficient number, since it is larger than the sum of its proper divisors (1).

2281725161 is an equidigital number, since it uses as much as digits as its factorization.

2281725161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 2281725161 is about 47767.4068900542. The cubic root of 2281725161 is about 1316.5007488913.

Adding to 2281725161 its reverse (1615271822), we get a palindrome (3896996983).

The spelling of 2281725161 in words is "two billion, two hundred eighty-one million, seven hundred twenty-five thousand, one hundred sixty-one".