22146287 has 2 divisors, whose sum is σ = 22146288. Its totient is φ = 22146286.

The previous prime is 22146281. The next prime is 22146329. The reversal of 22146287 is 78264122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22146287 - 2²⁴ = 5369071 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 (22146281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11073143 + 11073144.

It is an arithmetic number, because the mean of its divisors is an integer number (11073144).

Almost surely, 2^22146287 is an apocalyptic number.

22146287 is a deficient number, since it is larger than the sum of its proper divisors (1).

22146287 is an equidigital number, since it uses as much as digits as its factorization.

22146287 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10752, while the sum is 32.

The square root of 22146287 is about 4705.9841691191. The cubic root of 22146287 is about 280.8236250864.

The spelling of 22146287 in words is "twenty-two million, one hundred forty-six thousand, two hundred eighty-seven".