42215219 has 2 divisors, whose sum is σ = 42215220. Its totient is φ = 42215218.

The previous prime is 42215191. The next prime is 42215237. The reversal of 42215219 is 91251224.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42215219 is a prime.

It is a super-2 number, since 2×42215219² = 3564249430435922, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42215269) 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, 21107609 + 21107610.

It is an arithmetic number, because the mean of its divisors is an integer number (21107610).

Almost surely, 2^42215219 is an apocalyptic number.

42215219 is a deficient number, since it is larger than the sum of its proper divisors (1).

42215219 is an equidigital number, since it uses as much as digits as its factorization.

42215219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1440, while the sum is 26.

The square root of 42215219 is about 6497.3239876121. The cubic root of 42215219 is about 348.1953889107.

The spelling of 42215219 in words is "forty-two million, two hundred fifteen thousand, two hundred nineteen".