2190019 has 4 divisors (see below), whose sum is σ = 2358496. Its totient is φ = 2021544.

The previous prime is 2190017. The next prime is 2190031. The reversal of 2190019 is 9100912.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2190019 - 2¹ = 2190017 is a prime.

It is a super-2 number, since 2×2190019² = 9592366440722, which contains 22 as substring.

It is a Duffinian number.

2190019 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2190017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84219 + ... + 84244.

It is an arithmetic number, because the mean of its divisors is an integer number (589624).

2^2190019 is an apocalyptic number.

2190019 is a deficient number, since it is larger than the sum of its proper divisors (168477).

2190019 is a wasteful number, since it uses less digits than its factorization.

2190019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168476.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 2190019 is about 1479.8712781860. The cubic root of 2190019 is about 129.8621615945.

The spelling of 2190019 in words is "two million, one hundred ninety thousand, nineteen".