2224521 has 12 divisors (see below), whose sum is σ = 3460548. Its totient is φ = 1368864.

The previous prime is 2224517. The next prime is 2224553. The reversal of 2224521 is 1254222.

It can be written as a sum of positive squares in 2 ways, for example, as 90000 + 2134521 = 300^2 + 1461^2 .

It is not a de Polignac number, because 2224521 - 2² = 2224517 is a prime.

2224521 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2224494 and 2224503.

It is not an unprimeable number, because it can be changed into a prime (2224571) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9390 + ... + 9623.

It is an arithmetic number, because the mean of its divisors is an integer number (288379).

2^2224521 is an apocalyptic number.

It is an amenable number.

2224521 is a deficient number, since it is larger than the sum of its proper divisors (1236027).

2224521 is a wasteful number, since it uses less digits than its factorization.

2224521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19032 (or 19029 counting only the distinct ones).

The product of its digits is 320, while the sum is 18.

The square root of 2224521 is about 1491.4828192105. The cubic root of 2224521 is about 130.5405695858.

Adding to 2224521 its reverse (1254222), we get a palindrome (3478743).

Subtracting from 2224521 its reverse (1254222), we obtain a cube (970299 = 99³).

The spelling of 2224521 in words is "two million, two hundred twenty-four thousand, five hundred twenty-one".