225451 has 4 divisors (see below), whose sum is σ = 227304. Its totient is φ = 223600.

The previous prime is 225431. The next prime is 225457. The reversal of 225451 is 154522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 154522 = 2 ⋅77261.

It is a cyclic number.

It is not a de Polignac number, because 225451 - 2¹¹ = 223403 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225457) 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, 730 + ... + 991.

It is an arithmetic number, because the mean of its divisors is an integer number (56826).

2²²⁵⁴⁵¹ is an apocalyptic number.

225451 is a deficient number, since it is larger than the sum of its proper divisors (1853).

225451 is a wasteful number, since it uses less digits than its factorization.

225451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1852.

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

The square root of 225451 is about 474.8168067792. The cubic root of 225451 is about 60.8626309536.

Adding to 225451 its reverse (154522), we get a palindrome (379973).

It can be divided in two parts, 225 and 451, that multiplied together give a triangular number (101475 = T₄₅₀).

The spelling of 225451 in words is "two hundred twenty-five thousand, four hundred fifty-one".