225388281 has 8 divisors (see below), whose sum is σ = 300588480. Its totient is φ = 150223472.

The previous prime is 225388271. The next prime is 225388313. The reversal of 225388281 is 182883522.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225388281 - 2⁹ = 225387769 is a prime.

It is a super-2 number, since 2×225388281² = 101599754424269922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (225388271) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15931 + ... + 26543.

It is an arithmetic number, because the mean of its divisors is an integer number (37573560).

Almost surely, 2^225388281 is an apocalyptic number.

It is an amenable number.

225388281 is a deficient number, since it is larger than the sum of its proper divisors (75200199).

225388281 is a wasteful number, since it uses less digits than its factorization.

225388281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17695.

The product of its digits is 61440, while the sum is 39.

The square root of 225388281 is about 15012.9371210300. The cubic root of 225388281 is about 608.5698656768.

The spelling of 225388281 in words is "two hundred twenty-five million, three hundred eighty-eight thousand, two hundred eighty-one".