22117549 has 2 divisors, whose sum is σ = 22117550. Its totient is φ = 22117548.

The previous prime is 22117481. The next prime is 22117553. The reversal of 22117549 is 94571122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15132100 + 6985449 = 3890^2 + 2643^2 .

It is a cyclic number.

It is not a de Polignac number, because 22117549 - 2⁹ = 22117037 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22117549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22111549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11058774 + 11058775.

It is an arithmetic number, because the mean of its divisors is an integer number (11058775).

Almost surely, 2^22117549 is an apocalyptic number.

It is an amenable number.

22117549 is a deficient number, since it is larger than the sum of its proper divisors (1).

22117549 is an equidigital number, since it uses as much as digits as its factorization.

22117549 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5040, while the sum is 31.

The square root of 22117549 is about 4702.9298314987. The cubic root of 22117549 is about 280.7021027946.

The spelling of 22117549 in words is "twenty-two million, one hundred seventeen thousand, five hundred forty-nine".