1156228217 has 2 divisors, whose sum is σ = 1156228218. Its totient is φ = 1156228216.

The previous prime is 1156228211. The next prime is 1156228219. The reversal of 1156228217 is 7128226511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1118969401 + 37258816 = 33451^2 + 6104^2 .

It is a cyclic number.

It is not a de Polignac number, because 1156228217 - 2¹⁶ = 1156162681 is a prime.

Together with 1156228219, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1156228211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 578114108 + 578114109.

It is an arithmetic number, because the mean of its divisors is an integer number (578114109).

Almost surely, 2^1156228217 is an apocalyptic number.

It is an amenable number.

1156228217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1156228217 is an equidigital number, since it uses as much as digits as its factorization.

1156228217 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 1156228217 is about 34003.3559667278. The cubic root of 1156228217 is about 1049.5775222494.

The spelling of 1156228217 in words is "one billion, one hundred fifty-six million, two hundred twenty-eight thousand, two hundred seventeen".