22032287 has 2 divisors, whose sum is σ = 22032288. Its totient is φ = 22032286.

The previous prime is 22032271. The next prime is 22032313. The reversal of 22032287 is 78223022.

22032287 is nontrivially palindromic in base 13.

It is an a-pointer prime, because the next prime (22032313) can be obtained adding 22032287 to its sum of digits (26).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22032287 - 2⁴ = 22032271 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22032487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11016143 + 11016144.

It is an arithmetic number, because the mean of its divisors is an integer number (11016144).

Almost surely, 2^22032287 is an apocalyptic number.

22032287 is a deficient number, since it is larger than the sum of its proper divisors (1).

22032287 is an equidigital number, since it uses as much as digits as its factorization.

22032287 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2688, while the sum is 26.

The square root of 22032287 is about 4693.8563037230. The cubic root of 22032287 is about 280.3409409785.

The spelling of 22032287 in words is "twenty-two million, thirty-two thousand, two hundred eighty-seven".