22117247 has 2 divisors, whose sum is σ = 22117248. Its totient is φ = 22117246.

The previous prime is 22117243. The next prime is 22117253. The reversal of 22117247 is 74271122.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22117247 - 2² = 22117243 is a prime.

It is a super-2 number, since 2×22117247² = 978345229718018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22117241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11058623 + 11058624.

It is an arithmetic number, because the mean of its divisors is an integer number (11058624).

Almost surely, 2^22117247 is an apocalyptic number.

22117247 is a deficient number, since it is larger than the sum of its proper divisors (1).

22117247 is an equidigital number, since it uses as much as digits as its factorization.

22117247 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1568, while the sum is 26.

The square root of 22117247 is about 4702.8977237444. The cubic root of 22117247 is about 280.7008251904.

Adding to 22117247 its reverse (74271122), we get a palindrome (96388369).

The spelling of 22117247 in words is "twenty-two million, one hundred seventeen thousand, two hundred forty-seven".