42224309 has 2 divisors, whose sum is σ = 42224310. Its totient is φ = 42224308.

The previous prime is 42224291. The next prime is 42224317. The reversal of 42224309 is 90342224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38812900 + 3411409 = 6230^2 + 1847^2 .

It is a cyclic number.

It is not a de Polignac number, because 42224309 - 2²⁰ = 41175733 is a prime.

It is a super-3 number, since 3×42224309³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42224909) 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, 21112154 + 21112155.

It is an arithmetic number, because the mean of its divisors is an integer number (21112155).

Almost surely, 2^42224309 is an apocalyptic number.

It is an amenable number.

42224309 is a deficient number, since it is larger than the sum of its proper divisors (1).

42224309 is an equidigital number, since it uses as much as digits as its factorization.

42224309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 42224309 is about 6498.0234687172. The cubic root of 42224309 is about 348.2203788631.

The spelling of 42224309 in words is "forty-two million, two hundred twenty-four thousand, three hundred nine".