2225578 has 4 divisors (see below), whose sum is σ = 3338370. Its totient is φ = 1112788.

The previous prime is 2225569. The next prime is 2225579. The reversal of 2225578 is 8755222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2093809 + 131769 = 1447^2 + 363^2 .

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a plaindrome in base 10.

It is not an unprimeable number, because it can be changed into a prime (2225579) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556393 + ... + 556396.

2^2225578 is an apocalyptic number.

2225578 is a deficient number, since it is larger than the sum of its proper divisors (1112792).

2225578 is a wasteful number, since it uses less digits than its factorization.

2225578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1112791.

The product of its digits is 11200, while the sum is 31.

The square root of 2225578 is about 1491.8371224768. The cubic root of 2225578 is about 130.5612421311.

It can be divided in two parts, 22 and 25578, that added together give a square (25600 = 160²).

The spelling of 2225578 in words is "two million, two hundred twenty-five thousand, five hundred seventy-eight".