222206249 has 2 divisors, whose sum is σ = 222206250. Its totient is φ = 222206248.

The previous prime is 222206239. The next prime is 222206267. The reversal of 222206249 is 942602222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 222010000 + 196249 = 14900^2 + 443^2 .

It is a cyclic number.

It is not a de Polignac number, because 222206249 - 2⁸ = 222205993 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (222206239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111103124 + 111103125.

It is an arithmetic number, because the mean of its divisors is an integer number (111103125).

Almost surely, 2^222206249 is an apocalyptic number.

It is an amenable number.

222206249 is a deficient number, since it is larger than the sum of its proper divisors (1).

222206249 is an equidigital number, since it uses as much as digits as its factorization.

222206249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 222206249 is about 14906.5840822101. The cubic root of 222206249 is about 605.6923512941.

It can be divided in two parts, 22220 and 6249, that multiplied together give a triangular number (138852780 = T₁₆₆₆₄).

The spelling of 222206249 in words is "two hundred twenty-two million, two hundred six thousand, two hundred forty-nine".