2149540043 has 4 divisors (see below), whose sum is σ = 2456617200. Its totient is φ = 1842462888.

The previous prime is 2149540037. The next prime is 2149540067. The reversal of 2149540043 is 3400459412.

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

It is not a de Polignac number, because 2149540043 - 2³⁰ = 1075798219 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2149539991 and 2149540009.

It is not an unprimeable number, because it can be changed into a prime (2149540343) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153538568 + ... + 153538581.

It is an arithmetic number, because the mean of its divisors is an integer number (614154300).

Almost surely, 2^2149540043 is an apocalyptic number.

2149540043 is a deficient number, since it is larger than the sum of its proper divisors (307077157).

2149540043 is an equidigital number, since it uses as much as digits as its factorization.

2149540043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 307077156.

The product of its (nonzero) digits is 17280, while the sum is 32.

The square root of 2149540043 is about 46363.1323682945. The cubic root of 2149540043 is about 1290.5708354391.

Adding to 2149540043 its reverse (3400459412), we get a palindrome (5549999455).

The spelling of 2149540043 in words is "two billion, one hundred forty-nine million, five hundred forty thousand, forty-three".