22117481 has 2 divisors, whose sum is σ = 22117482. Its totient is φ = 22117480.

The previous prime is 22117471. The next prime is 22117549. The reversal of 22117481 is 18471122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 13213225 + 8904256 = 3635^2 + 2984^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22117481 is a prime.

It is a super-2 number, since 2×22117481² = 978365931570722, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 22117481.

It is not a weakly prime, because it can be changed into another prime (22117451) 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, 11058740 + 11058741.

It is an arithmetic number, because the mean of its divisors is an integer number (11058741).

Almost surely, 2^22117481 is an apocalyptic number.

It is an amenable number.

22117481 is a deficient number, since it is larger than the sum of its proper divisors (1).

22117481 is an equidigital number, since it uses as much as digits as its factorization.

22117481 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 26.

The square root of 22117481 is about 4702.9226019572. The cubic root of 22117481 is about 280.7018151232.

The spelling of 22117481 in words is "twenty-two million, one hundred seventeen thousand, four hundred eighty-one".