2173530 has 32 divisors (see below), whose sum is σ = 5318784. Its totient is φ = 568256.

The previous prime is 2173529. The next prime is 2173531. The reversal of 2173530 is 353712.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2173529) and next prime (2173531).

It is a junction number, because it is equal to n+sod(n) for n = 2173497 and 2173506.

It is not an unprimeable number, because it can be changed into a prime (2173531) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 907 + ... + 2273.

It is an arithmetic number, because the mean of its divisors is an integer number (166212).

2^2173530 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2173530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2659392).

2173530 is an abundant number, since it is smaller than the sum of its proper divisors (3145254).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2173530 is a wasteful number, since it uses less digits than its factorization.

2173530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1430.

The product of its (nonzero) digits is 630, while the sum is 21.

The square root of 2173530 is about 1474.2896594632. The cubic root of 2173530 is about 129.5354225982.

The spelling of 2173530 in words is "two million, one hundred seventy-three thousand, five hundred thirty".