22687201 has 2 divisors, whose sum is σ = 22687202. Its totient is φ = 22687200.

The previous prime is 22687199. The next prime is 22687219. The reversal of 22687201 is 10278622.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 12952801 + 9734400 = 3599^2 + 3120^2 .

It is a cyclic number.

It is not a de Polignac number, because 22687201 - 2¹ = 22687199 is a prime.

Together with 22687199, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 22687201.

It is not a weakly prime, because it can be changed into another prime (22687271) 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, 11343600 + 11343601.

It is an arithmetic number, because the mean of its divisors is an integer number (11343601).

Almost surely, 2^22687201 is an apocalyptic number.

It is an amenable number.

22687201 is a deficient number, since it is larger than the sum of its proper divisors (1).

22687201 is an equidigital number, since it uses as much as digits as its factorization.

22687201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 22687201 is about 4763.1083338509. The cubic root of 22687201 is about 283.0915934218.

The spelling of 22687201 in words is "twenty-two million, six hundred eighty-seven thousand, two hundred one".