222990637817 has 2 divisors, whose sum is σ = 222990637818. Its totient is φ = 222990637816.

The previous prime is 222990637801. The next prime is 222990637867. The reversal of 222990637817 is 718736099222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 119865518656 + 103125119161 = 346216^2 + 321131^2 .

It is a cyclic number.

It is not a de Polignac number, because 222990637817 - 2⁴ = 222990637801 is a prime.

It is not a weakly prime, because it can be changed into another prime (222990637867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111495318908 + 111495318909.

It is an arithmetic number, because the mean of its divisors is an integer number (111495318909).

Almost surely, 2^222990637817 is an apocalyptic number.

It is an amenable number.

222990637817 is a deficient number, since it is larger than the sum of its proper divisors (1).

222990637817 is an equidigital number, since it uses as much as digits as its factorization.

222990637817 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4572288, while the sum is 56.

The spelling of 222990637817 in words is "two hundred twenty-two billion, nine hundred ninety million, six hundred thirty-seven thousand, eight hundred seventeen".