222984661 has 2 divisors, whose sum is σ = 222984662. Its totient is φ = 222984660.

The previous prime is 222984653. The next prime is 222984709. The reversal of 222984661 is 166489222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 215531761 + 7452900 = 14681^2 + 2730^2 .

It is a cyclic number.

It is not a de Polignac number, because 222984661 - 2³ = 222984653 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222984611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 111492330 + 111492331.

It is an arithmetic number, because the mean of its divisors is an integer number (111492331).

Almost surely, 2^222984661 is an apocalyptic number.

It is an amenable number.

222984661 is a deficient number, since it is larger than the sum of its proper divisors (1).

222984661 is an equidigital number, since it uses as much as digits as its factorization.

222984661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 40.

The square root of 222984661 is about 14932.6709265289. The cubic root of 222984661 is about 606.3987951492.

The spelling of 222984661 in words is "two hundred twenty-two million, nine hundred eighty-four thousand, six hundred sixty-one".