2191019 has 2 divisors, whose sum is σ = 2191020. Its totient is φ = 2191018.

The previous prime is 2191001. The next prime is 2191027. The reversal of 2191019 is 9101912.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2191019 - 2⁸ = 2190763 is a prime.

It is a super-2 number, since 2×2191019² = 9601128516722, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 2190985 and 2191003.

It is not a weakly prime, because it can be changed into another prime (2191069) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1095509 + 1095510.

It is an arithmetic number, because the mean of its divisors is an integer number (1095510).

2^2191019 is an apocalyptic number.

2191019 is a deficient number, since it is larger than the sum of its proper divisors (1).

2191019 is an equidigital number, since it uses as much as digits as its factorization.

2191019 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162, while the sum is 23.

The square root of 2191019 is about 1480.2091068494. The cubic root of 2191019 is about 129.8819243456.

The spelling of 2191019 in words is "two million, one hundred ninety-one thousand, nineteen".