1166228281 has 2 divisors, whose sum is σ = 1166228282. Its totient is φ = 1166228280.

The previous prime is 1166228267. The next prime is 1166228293. The reversal of 1166228281 is 1828226611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 943472656 + 222755625 = 30716^2 + 14925^2 .

It is a cyclic number.

It is not a de Polignac number, because 1166228281 - 2¹⁹ = 1165703993 is a prime.

It is a super-2 number, since 2×1166228281² = 2720176806808429922, 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 1166228281.

It is not a weakly prime, because it can be changed into another prime (1166228981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 583114140 + 583114141.

It is an arithmetic number, because the mean of its divisors is an integer number (583114141).

Almost surely, 2^1166228281 is an apocalyptic number.

It is an amenable number.

1166228281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1166228281 is an equidigital number, since it uses as much as digits as its factorization.

1166228281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 37.

The square root of 1166228281 is about 34150.0846411835. The cubic root of 1166228281 is about 1052.5947258755.

The spelling of 1166228281 in words is "one billion, one hundred sixty-six million, two hundred twenty-eight thousand, two hundred eighty-one".