22206637 has 2 divisors, whose sum is σ = 22206638. Its totient is φ = 22206636.

The previous prime is 22206617. The next prime is 22206643. The reversal of 22206637 is 73660222.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19838116 + 2368521 = 4454^2 + 1539^2 .

It is a cyclic number.

It is not a de Polignac number, because 22206637 - 2¹⁵ = 22173869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22206617) 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, 11103318 + 11103319.

It is an arithmetic number, because the mean of its divisors is an integer number (11103319).

Almost surely, 2^22206637 is an apocalyptic number.

It is an amenable number.

22206637 is a deficient number, since it is larger than the sum of its proper divisors (1).

22206637 is an equidigital number, since it uses as much as digits as its factorization.

22206637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 22206637 is about 4712.3918555231. The cubic root of 22206637 is about 281.0784809685.

Adding to 22206637 its reverse (73660222), we get a palindrome (95866859).

The spelling of 22206637 in words is "twenty-two million, two hundred six thousand, six hundred thirty-seven".