222316681 has 2 divisors, whose sum is σ = 222316682. Its totient is φ = 222316680.

The previous prime is 222316651. The next prime is 222316687. The reversal of 222316681 is 186613222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 221533456 + 783225 = 14884^2 + 885^2 .

It is a cyclic number.

It is not a de Polignac number, because 222316681 - 2⁵ = 222316649 is a prime.

It is a super-2 number, since 2×222316681² = 98849413301711522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (222316687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111158340 + 111158341.

It is an arithmetic number, because the mean of its divisors is an integer number (111158341).

Almost surely, 2^222316681 is an apocalyptic number.

It is an amenable number.

222316681 is a deficient number, since it is larger than the sum of its proper divisors (1).

222316681 is an equidigital number, since it uses as much as digits as its factorization.

222316681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6912, while the sum is 31.

The square root of 222316681 is about 14910.2877571159. The cubic root of 222316681 is about 605.7926736155.

The spelling of 222316681 in words is "two hundred twenty-two million, three hundred sixteen thousand, six hundred eighty-one".