2173321 has 4 divisors (see below), whose sum is σ = 2176272. Its totient is φ = 2170372.

The previous prime is 2173319. The next prime is 2173333. The reversal of 2173321 is 1233712.

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 2173321 - 2¹ = 2173319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2173361) 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, 666 + ... + 2188.

It is an arithmetic number, because the mean of its divisors is an integer number (544068).

2^2173321 is an apocalyptic number.

It is an amenable number.

2173321 is a deficient number, since it is larger than the sum of its proper divisors (2951).

2173321 is a wasteful number, since it uses less digits than its factorization.

2173321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2950.

The product of its digits is 252, while the sum is 19.

The square root of 2173321 is about 1474.2187761659. The cubic root of 2173321 is about 129.5312705550.

The spelling of 2173321 in words is "two million, one hundred seventy-three thousand, three hundred twenty-one".