222356789 has 2 divisors, whose sum is σ = 222356790. Its totient is φ = 222356788.

The previous prime is 222356777. The next prime is 222356803. The reversal of 222356789 is 987653222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 217798564 + 4558225 = 14758^2 + 2135^2 .

It is a cyclic number.

It is not a de Polignac number, because 222356789 - 2¹² = 222352693 is a prime.

It is a super-2 number, since 2×222356789² = 98885083228781042, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (272356789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111178394 + 111178395.

It is an arithmetic number, because the mean of its divisors is an integer number (111178395).

Almost surely, 2^222356789 is an apocalyptic number.

It is an amenable number.

222356789 is a deficient number, since it is larger than the sum of its proper divisors (1).

222356789 is an equidigital number, since it uses as much as digits as its factorization.

222356789 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 362880, while the sum is 44.

The square root of 222356789 is about 14911.6326738557. The cubic root of 222356789 is about 605.8291016386.

The spelling of 222356789 in words is "two hundred twenty-two million, three hundred fifty-six thousand, seven hundred eighty-nine".