42224291 has 2 divisors, whose sum is σ = 42224292. Its totient is φ = 42224290.

The previous prime is 42224279. The next prime is 42224309. The reversal of 42224291 is 19242224.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42224291 - 2⁶ = 42224227 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 42224291.

It is not a weakly prime, because it can be changed into another prime (42224491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21112145 + 21112146.

It is an arithmetic number, because the mean of its divisors is an integer number (21112146).

Almost surely, 2^42224291 is an apocalyptic number.

42224291 is a deficient number, since it is larger than the sum of its proper divisors (1).

42224291 is an equidigital number, since it uses as much as digits as its factorization.

42224291 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2304, while the sum is 26.

The square root of 42224291 is about 6498.0220836805. The cubic root of 42224291 is about 348.2203293816.

The spelling of 42224291 in words is "forty-two million, two hundred twenty-four thousand, two hundred ninety-one".