2225521 has 16 divisors (see below), whose sum is σ = 2515968. Its totient is φ = 1958400.

The previous prime is 2225501. The next prime is 2225533. The reversal of 2225521 is 1255222.

It is not a de Polignac number, because 2225521 - 2⁷ = 2225393 is a prime.

It is a Duffinian number.

2225521 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2225501) 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, 21556 + ... + 21658.

It is an arithmetic number, because the mean of its divisors is an integer number (157248).

2^2225521 is an apocalyptic number.

It is an amenable number.

2225521 is a deficient number, since it is larger than the sum of its proper divisors (290447).

2225521 is a wasteful number, since it uses less digits than its factorization.

2225521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 192.

The product of its digits is 400, while the sum is 19.

The square root of 2225521 is about 1491.8180183923. The cubic root of 2225521 is about 130.5601275062.

Subtracting from 2225521 its reverse (1255222), we obtain a cube (970299 = 99³).

The spelling of 2225521 in words is "two million, two hundred twenty-five thousand, five hundred twenty-one".