22070861 has 2 divisors, whose sum is σ = 22070862. Its totient is φ = 22070860.

The previous prime is 22070857. The next prime is 22070899. The reversal of 22070861 is 16807022.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 21215236 + 855625 = 4606^2 + 925^2 .

It is a cyclic number.

It is not a de Polignac number, because 22070861 - 2² = 22070857 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22070861.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22070831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11035430 + 11035431.

It is an arithmetic number, because the mean of its divisors is an integer number (11035431).

Almost surely, 2^22070861 is an apocalyptic number.

It is an amenable number.

22070861 is a deficient number, since it is larger than the sum of its proper divisors (1).

22070861 is an equidigital number, since it uses as much as digits as its factorization.

22070861 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1344, while the sum is 26.

The square root of 22070861 is about 4697.9634949625. The cubic root of 22070861 is about 280.5044520208.

Adding to 22070861 its reverse (16807022), we get a palindrome (38877883).

The spelling of 22070861 in words is "twenty-two million, seventy thousand, eight hundred sixty-one".