22112281 has 2 divisors, whose sum is σ = 22112282. Its totient is φ = 22112280.

The previous prime is 22112267. The next prime is 22112287. The reversal of 22112281 is 18221122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19360000 + 2752281 = 4400^2 + 1659^2 .

It is a cyclic number.

It is not a de Polignac number, because 22112281 - 2⁵ = 22112249 is a prime.

It is a super-2 number, since 2×22112281² = 977905942045922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (22112287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11056140 + 11056141.

It is an arithmetic number, because the mean of its divisors is an integer number (11056141).

Almost surely, 2^22112281 is an apocalyptic number.

It is an amenable number.

22112281 is a deficient number, since it is larger than the sum of its proper divisors (1).

22112281 is an equidigital number, since it uses as much as digits as its factorization.

22112281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 128, while the sum is 19.

The square root of 22112281 is about 4702.3697217467. The cubic root of 22112281 is about 280.6798149710.

The spelling of 22112281 in words is "twenty-two million, one hundred twelve thousand, two hundred eighty-one".