225481 has 4 divisors (see below), whose sum is σ = 226432. Its totient is φ = 224532.

The previous prime is 225479. The next prime is 225493. The reversal of 225481 is 184522.

225481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 225481 - 2¹ = 225479 is a prime.

It is a super-2 number, since 2×225481² = 101683362722, which contains 22 as substring.

It is a Duffinian number.

225481 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (225431) 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, 220 + ... + 706.

It is an arithmetic number, because the mean of its divisors is an integer number (56608).

2²²⁵⁴⁸¹ is an apocalyptic number.

It is an amenable number.

225481 is a deficient number, since it is larger than the sum of its proper divisors (951).

225481 is an equidigital number, since it uses as much as digits as its factorization.

225481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 950.

The product of its digits is 640, while the sum is 22.

The square root of 225481 is about 474.8483968595. The cubic root of 225481 is about 60.8653304285.

The spelling of 225481 in words is "two hundred twenty-five thousand, four hundred eighty-one".