222399146309 has 2 divisors, whose sum is σ = 222399146310. Its totient is φ = 222399146308.

The previous prime is 222399146303. The next prime is 222399146329. The reversal of 222399146309 is 903641993222.

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., 112691133025 + 109708013284 = 335695^2 + 331222^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-222399146309 is a prime.

It is a super-2 number, since 2×222399146309² (a number of 23 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222399146303) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111199573154 + 111199573155.

It is an arithmetic number, because the mean of its divisors is an integer number (111199573155).

Almost surely, 2^222399146309 is an apocalyptic number.

It is an amenable number.

222399146309 is a deficient number, since it is larger than the sum of its proper divisors (1).

222399146309 is an equidigital number, since it uses as much as digits as its factorization.

222399146309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1259712, while the sum is 50.

The spelling of 222399146309 in words is "two hundred twenty-two billion, three hundred ninety-nine million, one hundred forty-six thousand, three hundred nine".