42229217 has 2 divisors, whose sum is σ = 42229218. Its totient is φ = 42229216.

The previous prime is 42229199. The next prime is 42229237. The reversal of 42229217 is 71292224.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27050401 + 15178816 = 5201^2 + 3896^2 .

It is a cyclic number.

It is not a de Polignac number, because 42229217 - 2²⁰ = 41180641 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42229217.

It is not a weakly prime, because it can be changed into another prime (42229237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21114608 + 21114609.

It is an arithmetic number, because the mean of its divisors is an integer number (21114609).

Almost surely, 2^42229217 is an apocalyptic number.

It is an amenable number.

42229217 is a deficient number, since it is larger than the sum of its proper divisors (1).

42229217 is an equidigital number, since it uses as much as digits as its factorization.

42229217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 42229217 is about 6498.4011110426. The cubic root of 42229217 is about 348.2338702969.

The spelling of 42229217 in words is "forty-two million, two hundred twenty-nine thousand, two hundred seventeen".