2215173 has 4 divisors (see below), whose sum is σ = 2953568. Its totient is φ = 1476780.

The previous prime is 2215163. The next prime is 2215177. The reversal of 2215173 is 3715122.

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 not a de Polignac number, because 2215173 - 2⁵ = 2215141 is a prime.

It is a d-powerful number, because it can be written as 2 + 2²¹ + 1 + 5³ + 1 + 7⁶ + 3⁵ .

It is a D-number.

It is a Duffinian number.

2215173 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215177) 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, 369193 + ... + 369198.

It is an arithmetic number, because the mean of its divisors is an integer number (738392).

2^2215173 is an apocalyptic number.

It is an amenable number.

2215173 is a deficient number, since it is larger than the sum of its proper divisors (738395).

2215173 is an equidigital number, since it uses as much as digits as its factorization.

2215173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 738394.

The product of its digits is 420, while the sum is 21.

The square root of 2215173 is about 1488.3457259656. The cubic root of 2215173 is about 130.3574580196.

The spelling of 2215173 in words is "two million, two hundred fifteen thousand, one hundred seventy-three".