2171249043 has 4 divisors (see below), whose sum is σ = 2894998728. Its totient is φ = 1447499360.

The previous prime is 2171249033. The next prime is 2171249051. The reversal of 2171249043 is 3409421712.

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

It is a cyclic number.

It is not a de Polignac number, because 2171249043 - 2⁶ = 2171248979 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2171248995 and 2171249013.

It is not an unprimeable number, because it can be changed into a prime (2171249033) 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, 361874838 + ... + 361874843.

It is an arithmetic number, because the mean of its divisors is an integer number (723749682).

Almost surely, 2^2171249043 is an apocalyptic number.

2171249043 is a deficient number, since it is larger than the sum of its proper divisors (723749685).

2171249043 is an equidigital number, since it uses as much as digits as its factorization.

2171249043 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 723749684.

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 2171249043 is about 46596.6634320527. The cubic root of 2171249043 is about 1294.9009416236.

The spelling of 2171249043 in words is "two billion, one hundred seventy-one million, two hundred forty-nine thousand, forty-three".