2191442019 has 24 divisors (see below), whose sum is σ = 3199328496. Its totient is φ = 1326384000.

The previous prime is 2191442017. The next prime is 2191442021. The reversal of 2191442019 is 9102441912.

It is an interprime number because it is at equal distance from previous prime (2191442017) and next prime (2191442021).

It is not a de Polignac number, because 2191442019 - 2¹ = 2191442017 is a prime.

It is a super-2 number, since 2×2191442019² = 9604836245277592722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2191442017) 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 in 23 ways as a sum of consecutive naturals, for example, 137569 + ... + 152669.

It is an arithmetic number, because the mean of its divisors is an integer number (133305354).

Almost surely, 2^2191442019 is an apocalyptic number.

2191442019 is a deficient number, since it is larger than the sum of its proper divisors (1007886477).

2191442019 is a wasteful number, since it uses less digits than its factorization.

2191442019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15239 (or 15178 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 2191442019 is about 46812.8403218604. The cubic root of 2191442019 is about 1298.9028255489.

The spelling of 2191442019 in words is "two billion, one hundred ninety-one million, four hundred forty-two thousand, nineteen".