2161583 has 4 divisors (see below), whose sum is σ = 2198280. Its totient is φ = 2124888.

The previous prime is 2161571. The next prime is 2161591. The reversal of 2161583 is 3851612.

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 2161583 - 2¹⁶ = 2096047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2161513) 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, 18260 + ... + 18377.

It is an arithmetic number, because the mean of its divisors is an integer number (549570).

2^2161583 is an apocalyptic number.

2161583 is a deficient number, since it is larger than the sum of its proper divisors (36697).

2161583 is an equidigital number, since it uses as much as digits as its factorization.

2161583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36696.

The product of its digits is 1440, while the sum is 26.

The square root of 2161583 is about 1470.2322945712. The cubic root of 2161583 is about 129.2976521177.

It can be divided in two parts, 2161 and 583, that added together give a cube (2744 = 14³).

The spelling of 2161583 in words is "two million, one hundred sixty-one thousand, five hundred eighty-three".