222851729 has 2 divisors, whose sum is σ = 222851730. Its totient is φ = 222851728.

The previous prime is 222851723. The next prime is 222851743. The reversal of 222851729 is 927158222.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 126517504 + 96334225 = 11248^2 + 9815^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222851729 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 222851692 and 222851701.

It is not a weakly prime, because it can be changed into another prime (222851723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111425864 + 111425865.

It is an arithmetic number, because the mean of its divisors is an integer number (111425865).

Almost surely, 2^222851729 is an apocalyptic number.

It is an amenable number.

222851729 is a deficient number, since it is larger than the sum of its proper divisors (1).

222851729 is an equidigital number, since it uses as much as digits as its factorization.

222851729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 38.

The square root of 222851729 is about 14928.2192173079. The cubic root of 222851729 is about 606.2782699256.

The spelling of 222851729 in words is "two hundred twenty-two million, eight hundred fifty-one thousand, seven hundred twenty-nine".