222981637 has 2 divisors, whose sum is σ = 222981638. Its totient is φ = 222981636.

The previous prime is 222981631. The next prime is 222981659. The reversal of 222981637 is 736189222.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127215841 + 95765796 = 11279^2 + 9786^2 .

It is a cyclic number.

It is not a de Polignac number, because 222981637 - 2⁷ = 222981509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 222981637.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (222981631) 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, 111490818 + 111490819.

It is an arithmetic number, because the mean of its divisors is an integer number (111490819).

Almost surely, 2^222981637 is an apocalyptic number.

It is an amenable number.

222981637 is a deficient number, since it is larger than the sum of its proper divisors (1).

222981637 is an equidigital number, since it uses as much as digits as its factorization.

222981637 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 72576, while the sum is 40.

The square root of 222981637 is about 14932.5696716942. The cubic root of 222981637 is about 606.3960539170.

The spelling of 222981637 in words is "two hundred twenty-two million, nine hundred eighty-one thousand, six hundred thirty-seven".