220123229 has 2 divisors, whose sum is σ = 220123230. Its totient is φ = 220123228.

The previous prime is 220123223. The next prime is 220123247. The reversal of 220123229 is 922321022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215414329 + 4708900 = 14677^2 + 2170^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220123229 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (220123223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 110061614 + 110061615.

It is an arithmetic number, because the mean of its divisors is an integer number (110061615).

Almost surely, 2^220123229 is an apocalyptic number.

It is an amenable number.

220123229 is a deficient number, since it is larger than the sum of its proper divisors (1).

220123229 is an equidigital number, since it uses as much as digits as its factorization.

220123229 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 220123229 is about 14836.5504413930. The cubic root of 220123229 is about 603.7937663006.

The spelling of 220123229 in words is "two hundred twenty million, one hundred twenty-three thousand, two hundred twenty-nine".