2573 has 4 divisors (see below), whose sum is σ = 2688. Its totient is φ = 2460.

The previous prime is 2557. The next prime is 2579. The reversal of 2573 is 3752.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 2573 - 2^{4} = 2557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a plaindrome in base 9 and base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2579) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11 + ... + 72.

It is an arithmetic number, because the mean of its divisors is an integer number (672).

It is an amenable number.

2573 is a deficient number, since it is larger than the sum of its proper divisors (115).

2573 is an equidigital number, since it uses as much as digits as its factorization.

2573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114.

The product of its digits is 210, while the sum is 17.

The square root of 2573 is about 50.7247474119. The cubic root of 2573 is about 13.7029244117.

Subtracting from 2573 its sum of digits (17), we obtain a triangular number (2556 = T_{71}).

It can be divided in two parts, 2 and 573, that added together give a palindrome (575).

The spelling of 2573 in words is "two thousand, five hundred seventy-three".

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