2043553 has 4 divisors (see below), whose sum is σ = 2163780. Its totient is φ = 1923328.

The previous prime is 2043541. The next prime is 2043571. The reversal of 2043553 is 3553402.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3553402 = 2 ⋅1776701.

It can be written as a sum of positive squares in 2 ways, for example, as 762129 + 1281424 = 873^2 + 1132^2 .

It is a cyclic number.

It is not a de Polignac number, because 2043553 - 2¹³ = 2035361 is a prime.

It is a super-2 number, since 2×2043553² = 8352217727618, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043523) 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, 60088 + ... + 60121.

It is an arithmetic number, because the mean of its divisors is an integer number (540945).

2^2043553 is an apocalyptic number.

It is an amenable number.

2043553 is a deficient number, since it is larger than the sum of its proper divisors (120227).

2043553 is a wasteful number, since it uses less digits than its factorization.

2043553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120226.

The product of its (nonzero) digits is 1800, while the sum is 22.

The square root of 2043553 is about 1429.5289433936. The cubic root of 2043553 is about 126.9001012402.

Adding to 2043553 its reverse (3553402), we get a palindrome (5596955).

The spelling of 2043553 in words is "two million, forty-three thousand, five hundred fifty-three".