22070261 has 2 divisors, whose sum is σ = 22070262. Its totient is φ = 22070260.

The previous prime is 22070221. The next prime is 22070263. The reversal of 22070261 is 16207022.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21446161 + 624100 = 4631^2 + 790^2 .

It is a cyclic number.

It is not a de Polignac number, because 22070261 - 2¹⁰ = 22069237 is a prime.

Together with 22070263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22070263) 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, 11035130 + 11035131.

It is an arithmetic number, because the mean of its divisors is an integer number (11035131).

Almost surely, 2^22070261 is an apocalyptic number.

It is an amenable number.

22070261 is a deficient number, since it is larger than the sum of its proper divisors (1).

22070261 is an equidigital number, since it uses as much as digits as its factorization.

22070261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 22070261 is about 4697.8996370719. The cubic root of 22070261 is about 280.5019101445.

Adding to 22070261 its reverse (16207022), we get a palindrome (38277283).

The spelling of 22070261 in words is "twenty-two million, seventy thousand, two hundred sixty-one".