222661013 has 2 divisors, whose sum is σ = 222661014. Its totient is φ = 222661012.

The previous prime is 222660983. The next prime is 222661027. The reversal of 222661013 is 310166222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 180579844 + 42081169 = 13438^2 + 6487^2 .

It is a cyclic number.

It is not a de Polignac number, because 222661013 - 2¹⁰ = 222659989 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 222661013.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222661063) 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, 111330506 + 111330507.

It is an arithmetic number, because the mean of its divisors is an integer number (111330507).

Almost surely, 2^222661013 is an apocalyptic number.

It is an amenable number.

222661013 is a deficient number, since it is larger than the sum of its proper divisors (1).

222661013 is an equidigital number, since it uses as much as digits as its factorization.

222661013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 222661013 is about 14921.8300821313. The cubic root of 222661013 is about 606.1052700463.

The spelling of 222661013 in words is "two hundred twenty-two million, six hundred sixty-one thousand, thirteen".