42222281 has 2 divisors, whose sum is σ = 42222282. Its totient is φ = 42222280.

The previous prime is 42222253. The next prime is 42222287. The reversal of 42222281 is 18222224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27206656 + 15015625 = 5216^2 + 3875^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42222281 is a prime.

It is a super-2 number, since 2×42222281² = 3565442025685922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42222287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21111140 + 21111141.

It is an arithmetic number, because the mean of its divisors is an integer number (21111141).

Almost surely, 2^42222281 is an apocalyptic number.

It is an amenable number.

42222281 is a deficient number, since it is larger than the sum of its proper divisors (1).

42222281 is an equidigital number, since it uses as much as digits as its factorization.

42222281 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1024, while the sum is 23.

The square root of 42222281 is about 6497.8674193923. The cubic root of 42222281 is about 348.2148038578.

The spelling of 42222281 in words is "forty-two million, two hundred twenty-two thousand, two hundred eighty-one".