2019155 has 4 divisors (see below), whose sum is σ = 2422992. Its totient is φ = 1615320.

The previous prime is 2019137. The next prime is 2019181. The reversal of 2019155 is 5519102.

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

It is not a de Polignac number, because 2019155 - 2⁸ = 2018899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2019155.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201911 + ... + 201920.

It is an arithmetic number, because the mean of its divisors is an integer number (605748).

2^2019155 is an apocalyptic number.

2019155 is a deficient number, since it is larger than the sum of its proper divisors (403837).

2019155 is an equidigital number, since it uses as much as digits as its factorization.

2019155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403836.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 2019155 is about 1420.9697392978. The cubic root of 2019155 is about 126.3930574553.

The spelling of 2019155 in words is "two million, nineteen thousand, one hundred fifty-five".