225354581 has 4 divisors (see below), whose sum is σ = 225530700. Its totient is φ = 225178464.

The previous prime is 225354559. The next prime is 225354587. The reversal of 225354581 is 185453522.

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

It can be written as a sum of positive squares in 2 ways, for example, as 172922500 + 52432081 = 13150^2 + 7241^2 .

It is a cyclic number.

It is not a de Polignac number, because 225354581 - 2⁶ = 225354517 is a prime.

It is a super-3 number, since 3×225354581³ (a number of 26 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225354587) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 86126 + ... + 88703.

It is an arithmetic number, because the mean of its divisors is an integer number (56382675).

Almost surely, 2^225354581 is an apocalyptic number.

It is an amenable number.

225354581 is a deficient number, since it is larger than the sum of its proper divisors (176119).

225354581 is a wasteful number, since it uses less digits than its factorization.

225354581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176118.

The product of its digits is 48000, while the sum is 35.

The square root of 225354581 is about 15011.8147137513. The cubic root of 225354581 is about 608.5395330930.

The spelling of 225354581 in words is "two hundred twenty-five million, three hundred fifty-four thousand, five hundred eighty-one".