40018219 has 2 divisors, whose sum is σ = 40018220. Its totient is φ = 40018218.

The previous prime is 40018217. The next prime is 40018243. The reversal of 40018219 is 91281004.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40018219 - 2¹ = 40018217 is a prime.

It is a super-2 number, since 2×40018219² = 3202915703863922, which contains 22 as substring.

Together with 40018217, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 40018193 and 40018202.

It is not a weakly prime, because it can be changed into another prime (40018211) 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, 20009109 + 20009110.

It is an arithmetic number, because the mean of its divisors is an integer number (20009110).

Almost surely, 2^40018219 is an apocalyptic number.

40018219 is a deficient number, since it is larger than the sum of its proper divisors (1).

40018219 is an equidigital number, since it uses as much as digits as its factorization.

40018219 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 576, while the sum is 25.

The square root of 40018219 is about 6325.9954947818. The cubic root of 40018219 is about 342.0471048737.

The spelling of 40018219 in words is "forty million, eighteen thousand, two hundred nineteen".