2043542405 has 4 divisors (see below), whose sum is σ = 2452250892. Its totient is φ = 1634833920.

The previous prime is 2043542401. The next prime is 2043542407. The reversal of 2043542405 is 5042453402.

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

It can be written as a sum of positive squares in 2 ways, for example, as 240436036 + 1803106369 = 15506^2 + 42463^2 .

It is not a de Polignac number, because 2043542405 - 2² = 2043542401 is a prime.

It is a super-2 number, since 2×2043542405² = 8352131122066368050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2043542401) 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, 204354236 + ... + 204354245.

It is an arithmetic number, because the mean of its divisors is an integer number (613062723).

Almost surely, 2^2043542405 is an apocalyptic number.

It is an amenable number.

2043542405 is a deficient number, since it is larger than the sum of its proper divisors (408708487).

2043542405 is an equidigital number, since it uses as much as digits as its factorization.

2043542405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408708486.

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 2043542405 is about 45205.5572358090. The cubic root of 2043542405 is about 1268.9988193113.

Adding to 2043542405 its reverse (5042453402), we get a palindrome (7085995807).

The spelling of 2043542405 in words is "two billion, forty-three million, five hundred forty-two thousand, four hundred five".