22140247 has 2 divisors, whose sum is σ = 22140248. Its totient is φ = 22140246.

The previous prime is 22140241. The next prime is 22140269. The reversal of 22140247 is 74204122.

It is a happy number.

It is an a-pointer prime, because the next prime (22140269) can be obtained adding 22140247 to its sum of digits (22).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22140247 - 2¹⁵ = 22107479 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 (22140241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11070123 + 11070124.

It is an arithmetic number, because the mean of its divisors is an integer number (11070124).

Almost surely, 2^22140247 is an apocalyptic number.

22140247 is a deficient number, since it is larger than the sum of its proper divisors (1).

22140247 is an equidigital number, since it uses as much as digits as its factorization.

22140247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 22140247 is about 4705.3423892423. The cubic root of 22140247 is about 280.7980929070.

Adding to 22140247 its reverse (74204122), we get a palindrome (96344369).

The spelling of 22140247 in words is "twenty-two million, one hundred forty thousand, two hundred forty-seven".