225001 has 4 divisors (see below), whose sum is σ = 257152. Its totient is φ = 192852.

The previous prime is 224993. The next prime is 225023. The reversal of 225001 is 100522.

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 an emirpimes, since its reverse is a distinct semiprime: 100522 = 2 ⋅50261.

It is a cyclic number.

It is not a de Polignac number, because 225001 - 2³ = 224993 is a prime.

It is an Ulam number.

It is not an unprimeable number, because it can be changed into a prime (225061) 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, 16065 + ... + 16078.

It is an arithmetic number, because the mean of its divisors is an integer number (64288).

2²²⁵⁰⁰¹ is an apocalyptic number.

It is an amenable number.

225001 is a deficient number, since it is larger than the sum of its proper divisors (32151).

225001 is an equidigital number, since it uses as much as digits as its factorization.

225001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32150.

The product of its (nonzero) digits is 20, while the sum is 10.

The square root of 225001 is about 474.3427031166. The cubic root of 225001 is about 60.8221100623.

Adding to 225001 its reverse (100522), we get a palindrome (325523).

The spelling of 225001 in words is "two hundred twenty-five thousand, one".