2225178 has 32 divisors (see below), whose sum is σ = 5011200. Its totient is φ = 731808.

The previous prime is 2225177. The next prime is 2225183. The reversal of 2225178 is 8715222.

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

It is not an unprimeable number, because it can be changed into a prime (2225173) 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, 4575 + ... + 5037.

It is an arithmetic number, because the mean of its divisors is an integer number (156600).

2^2225178 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2225178, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2505600).

2225178 is an abundant number, since it is smaller than the sum of its proper divisors (2786022).

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

2225178 is a wasteful number, since it uses less digits than its factorization.

2225178 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 563 (or 557 counting only the distinct ones).

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

The square root of 2225178 is about 1491.7030535599. The cubic root of 2225178 is about 130.5534197997.

It can be divided in two parts, 22 and 25178, that added together give a triangular number (25200 = T₂₂₄).

The spelling of 2225178 in words is "two million, two hundred twenty-five thousand, one hundred seventy-eight".