225826221 has 16 divisors (see below), whose sum is σ = 307100160. Its totient is φ = 147576240.

The previous prime is 225826199. The next prime is 225826243. The reversal of 225826221 is 122628522.

It is an interprime number because it is at equal distance from previous prime (225826199) and next prime (225826243).

It is not a de Polignac number, because 225826221 - 2⁹ = 225825709 is a prime.

It is a super-2 number, since 2×225826221² = 101994964182281682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225826261) 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, 35166 + ... + 41088.

It is an arithmetic number, because the mean of its divisors is an integer number (19193760).

Almost surely, 2^225826221 is an apocalyptic number.

It is an amenable number.

225826221 is a deficient number, since it is larger than the sum of its proper divisors (81273939).

225826221 is a wasteful number, since it uses less digits than its factorization.

225826221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6176.

The product of its digits is 7680, while the sum is 30.

The square root of 225826221 is about 15027.5154633093. The cubic root of 225826221 is about 608.9637705913.

The spelling of 225826221 in words is "two hundred twenty-five million, eight hundred twenty-six thousand, two hundred twenty-one".