22051637 has 2 divisors, whose sum is σ = 22051638. Its totient is φ = 22051636.

The previous prime is 22051607. The next prime is 22051649. The reversal of 22051637 is 73615022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21911761 + 139876 = 4681^2 + 374^2 .

It is a cyclic number.

It is not a de Polignac number, because 22051637 - 2⁶ = 22051573 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22051607) 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, 11025818 + 11025819.

It is an arithmetic number, because the mean of its divisors is an integer number (11025819).

Almost surely, 2^22051637 is an apocalyptic number.

It is an amenable number.

22051637 is a deficient number, since it is larger than the sum of its proper divisors (1).

22051637 is an equidigital number, since it uses as much as digits as its factorization.

22051637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 22051637 is about 4695.9170563373. The cubic root of 22051637 is about 280.4229873849.

Adding to 22051637 its reverse (73615022), we get a palindrome (95666659).

The spelling of 22051637 in words is "twenty-two million, fifty-one thousand, six hundred thirty-seven".