2173671265 has 4 divisors (see below), whose sum is σ = 2608405524. Its totient is φ = 1738937008.

The previous prime is 2173671263. The next prime is 2173671317. The reversal of 2173671265 is 5621763712.

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 732405969 + 1441265296 = 27063^2 + 37964^2 .

It is a cyclic number.

It is not a de Polignac number, because 2173671265 - 2¹ = 2173671263 is a prime.

It is a Smith number, since the sum of its digits (40) 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 not an unprimeable number, because it can be changed into a prime (2173671263) 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, 217367122 + ... + 217367131.

It is an arithmetic number, because the mean of its divisors is an integer number (652101381).

Almost surely, 2^2173671265 is an apocalyptic number.

It is an amenable number.

2173671265 is a deficient number, since it is larger than the sum of its proper divisors (434734259).

2173671265 is an equidigital number, since it uses as much as digits as its factorization.

2173671265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 434734258.

The product of its digits is 105840, while the sum is 40.

The square root of 2173671265 is about 46622.6475545952. The cubic root of 2173671265 is about 1295.3822885114.

The spelling of 2173671265 in words is "two billion, one hundred seventy-three million, six hundred seventy-one thousand, two hundred sixty-five".