229126181 has 2 divisors, whose sum is σ = 229126182. Its totient is φ = 229126180.

The previous prime is 229126151. The next prime is 229126189. The reversal of 229126181 is 181621922.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 189310081 + 39816100 = 13759^2 + 6310^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-229126181 is a prime.

It is a super-2 number, since 2×229126181² = 104997613639289522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (229126189) 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, 114563090 + 114563091.

It is an arithmetic number, because the mean of its divisors is an integer number (114563091).

Almost surely, 2^229126181 is an apocalyptic number.

It is an amenable number.

229126181 is a deficient number, since it is larger than the sum of its proper divisors (1).

229126181 is an equidigital number, since it uses as much as digits as its factorization.

229126181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3456, while the sum is 32.

The square root of 229126181 is about 15136.9145138631. The cubic root of 229126181 is about 611.9156662881.

The spelling of 229126181 in words is "two hundred twenty-nine million, one hundred twenty-six thousand, one hundred eighty-one".