2043811 has 24 divisors (see below), whose sum is σ = 2723840. Its totient is φ = 1496880.

The previous prime is 2043793. The next prime is 2043817. The reversal of 2043811 is 1183402.

2043811 = T₄₂₀ + T₄₂₁ + ... + T₄₄₁.

It is not a de Polignac number, because 2043811 - 2⁵ = 2043779 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is not an unprimeable number, because it can be changed into a prime (2043817) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16030 + ... + 16156.

2^2043811 is an apocalyptic number.

2043811 is a deficient number, since it is larger than the sum of its proper divisors (680029).

2043811 is a wasteful number, since it uses less digits than its factorization.

2043811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175 (or 164 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 2043811 is about 1429.6191800616. The cubic root of 2043811 is about 126.9054414244.

It can be divided in two parts, 20438 and 11, that added together give a square (20449 = 143²).

The spelling of 2043811 in words is "two million, forty-three thousand, eight hundred eleven".