2173548409 has 4 divisors (see below), whose sum is σ = 2201061760. Its totient is φ = 2146035060.

The previous prime is 2173548383. The next prime is 2173548427. The reversal of 2173548409 is 9048453712.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2173548409 - 2⁷ = 2173548281 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2173548469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13756557 + ... + 13756714.

It is an arithmetic number, because the mean of its divisors is an integer number (550265440).

Almost surely, 2^2173548409 is an apocalyptic number.

It is an amenable number.

2173548409 is a deficient number, since it is larger than the sum of its proper divisors (27513351).

2173548409 is an equidigital number, since it uses as much as digits as its factorization.

2173548409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27513350.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 2173548409 is about 46621.3299788841. The cubic root of 2173548409 is about 1295.3578830294.

The spelling of 2173548409 in words is "two billion, one hundred seventy-three million, five hundred forty-eight thousand, four hundred nine".