42244229 has 2 divisors, whose sum is σ = 42244230. Its totient is φ = 42244228.

The previous prime is 42244217. The next prime is 42244231. The reversal of 42244229 is 92244224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28569025 + 13675204 = 5345^2 + 3698^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42244229 is a prime.

Together with 42244231, 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 (42244249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21122114 + 21122115.

It is an arithmetic number, because the mean of its divisors is an integer number (21122115).

Almost surely, 2^42244229 is an apocalyptic number.

It is an amenable number.

42244229 is a deficient number, since it is larger than the sum of its proper divisors (1).

42244229 is an equidigital number, since it uses as much as digits as its factorization.

42244229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 9216, while the sum is 29.

The square root of 42244229 is about 6499.5560617630. The cubic root of 42244229 is about 348.2751297841.

The spelling of 42244229 in words is "forty-two million, two hundred forty-four thousand, two hundred twenty-nine".