117228161 has 2 divisors, whose sum is σ = 117228162. Its totient is φ = 117228160.

The previous prime is 117228131. The next prime is 117228193. The reversal of 117228161 is 161822711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 109077136 + 8151025 = 10444^2 + 2855^2 .

It is a cyclic number.

It is not a de Polignac number, because 117228161 - 2¹⁴ = 117211777 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 (117228131) 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 as a sum of consecutive naturals, namely, 58614080 + 58614081.

It is an arithmetic number, because the mean of its divisors is an integer number (58614081).

Almost surely, 2^117228161 is an apocalyptic number.

It is an amenable number.

117228161 is a deficient number, since it is larger than the sum of its proper divisors (1).

117228161 is an equidigital number, since it uses as much as digits as its factorization.

117228161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1344, while the sum is 29.

The square root of 117228161 is about 10827.1954355687. The cubic root of 117228161 is about 489.4150467998.

The spelling of 117228161 in words is "one hundred seventeen million, two hundred twenty-eight thousand, one hundred sixty-one".