222638237 has 2 divisors, whose sum is σ = 222638238. Its totient is φ = 222638236.

The previous prime is 222638209. The next prime is 222638243. The reversal of 222638237 is 732836222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 217002361 + 5635876 = 14731^2 + 2374^2 .

It is a cyclic number.

It is not a de Polignac number, because 222638237 - 2²² = 218443933 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 222638197 and 222638206.

It is a congruent number.

It is a weakly prime.

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, 111319118 + 111319119.

It is an arithmetic number, because the mean of its divisors is an integer number (111319119).

Almost surely, 2^222638237 is an apocalyptic number.

It is an amenable number.

222638237 is a deficient number, since it is larger than the sum of its proper divisors (1).

222638237 is an equidigital number, since it uses as much as digits as its factorization.

222638237 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 48384, while the sum is 35.

The square root of 222638237 is about 14921.0668854476. The cubic root of 222638237 is about 606.0846031677.

The spelling of 222638237 in words is "two hundred twenty-two million, six hundred thirty-eight thousand, two hundred thirty-seven".