42224249 has 2 divisors, whose sum is σ = 42224250. Its totient is φ = 42224248.

The previous prime is 42224227. The next prime is 42224257. The reversal of 42224249 is 94242224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36966400 + 5257849 = 6080^2 + 2293^2 .

It is a cyclic number.

It is not a de Polignac number, because 42224249 - 2²⁴ = 25447033 is a prime.

It is a super-2 number, since 2×42224249² = 3565774407228002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (42224269) 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, 21112124 + 21112125.

It is an arithmetic number, because the mean of its divisors is an integer number (21112125).

Almost surely, 2^42224249 is an apocalyptic number.

It is an amenable number.

42224249 is a deficient number, since it is larger than the sum of its proper divisors (1).

42224249 is an equidigital number, since it uses as much as digits as its factorization.

42224249 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 42224249 is about 6498.0188519271. The cubic root of 42224249 is about 348.2202139247.

The spelling of 42224249 in words is "forty-two million, two hundred twenty-four thousand, two hundred forty-nine".