42220361 has 2 divisors, whose sum is σ = 42220362. Its totient is φ = 42220360.

The previous prime is 42220349. The next prime is 42220379. The reversal of 42220361 is 16302224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40246336 + 1974025 = 6344^2 + 1405^2 .

It is a cyclic number.

It is not a de Polignac number, because 42220361 - 2¹⁴ = 42203977 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42220331) 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, 21110180 + 21110181.

It is an arithmetic number, because the mean of its divisors is an integer number (21110181).

Almost surely, 2^42220361 is an apocalyptic number.

It is an amenable number.

42220361 is a deficient number, since it is larger than the sum of its proper divisors (1).

42220361 is an equidigital number, since it uses as much as digits as its factorization.

42220361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 42220361 is about 6497.7196769328. The cubic root of 42220361 is about 348.2095255818.

Adding to 42220361 its reverse (16302224), we get a palindrome (58522585).

The spelling of 42220361 in words is "forty-two million, two hundred twenty thousand, three hundred sixty-one".