2219491 has 2 divisors, whose sum is σ = 2219492. Its totient is φ = 2219490.

The previous prime is 2219489. The next prime is 2219513. The reversal of 2219491 is 1949122.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2219491 - 2¹ = 2219489 is a prime.

It is a super-2 number, since 2×2219491² = 9852280598162, which contains 22 as substring.

Together with 2219489, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (2219411) 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, 1109745 + 1109746.

It is an arithmetic number, because the mean of its divisors is an integer number (1109746).

2^2219491 is an apocalyptic number.

2219491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2219491 is an equidigital number, since it uses as much as digits as its factorization.

2219491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1296, while the sum is 28.

The square root of 2219491 is about 1489.7956235672. The cubic root of 2219491 is about 130.4421042541.

The spelling of 2219491 in words is "two million, two hundred nineteen thousand, four hundred ninety-one".