22071919 has 2 divisors, whose sum is σ = 22071920. Its totient is φ = 22071918.

The previous prime is 22071913. The next prime is 22071937. The reversal of 22071919 is 91917022.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 22071919 - 2¹⁵ = 22039151 is a prime.

It is a super-2 number, since 2×22071919² = 974339216685122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (22071913) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11035959 + 11035960.

It is an arithmetic number, because the mean of its divisors is an integer number (11035960).

Almost surely, 2^22071919 is an apocalyptic number.

22071919 is a deficient number, since it is larger than the sum of its proper divisors (1).

22071919 is an equidigital number, since it uses as much as digits as its factorization.

22071919 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 31.

The square root of 22071919 is about 4698.0760955949. The cubic root of 22071919 is about 280.5089340838.

The spelling of 22071919 in words is "twenty-two million, seventy-one thousand, nine hundred nineteen".