2165583973 has 4 divisors (see below), whose sum is σ = 2474953120. Its totient is φ = 1856214828.

The previous prime is 2165583943. The next prime is 2165583991. The reversal of 2165583973 is 3793855612.

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 2165583973 - 2¹⁷ = 2165452901 is a prime.

It is a super-2 number, since 2×2165583973² = 9379507888228929458, 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 (2165583943) 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, 154684563 + ... + 154684576.

It is an arithmetic number, because the mean of its divisors is an integer number (618738280).

Almost surely, 2^2165583973 is an apocalyptic number.

It is an amenable number.

2165583973 is a deficient number, since it is larger than the sum of its proper divisors (309369147).

2165583973 is an equidigital number, since it uses as much as digits as its factorization.

2165583973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309369146.

The product of its digits is 1360800, while the sum is 49.

The square root of 2165583973 is about 46535.8353637280. The cubic root of 2165583973 is about 1293.7737726485.

The spelling of 2165583973 in words is "two billion, one hundred sixty-five million, five hundred eighty-three thousand, nine hundred seventy-three".