2175822 has 72 divisors (see below), whose sum is σ = 5518968. Its totient is φ = 641520.

The previous prime is 2175793. The next prime is 2175827. The reversal of 2175822 is 2285712.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2175827) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 58788 + ... + 58824.

2^2175822 is an apocalyptic number.

2175822 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 2175822, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2759484).

2175822 is an abundant number, since it is smaller than the sum of its proper divisors (3343146).

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

2175822 is a wasteful number, since it uses less digits than its factorization.

2175822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76 (or 53 counting only the distinct ones).

The product of its digits is 2240, while the sum is 27.

The square root of 2175822 is about 1475.0667781494. The cubic root of 2175822 is about 129.5809385546.

The spelling of 2175822 in words is "two million, one hundred seventy-five thousand, eight hundred twenty-two".