225507 has 4 divisors (see below), whose sum is σ = 300680. Its totient is φ = 150336.

The previous prime is 225503. The next prime is 225509. The reversal of 225507 is 705522.

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

It is not a de Polignac number, because 225507 - 2² = 225503 is a prime.

It is a D-number.

It is a Duffinian number.

It is a plaindrome in base 11.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 225507.

It is not an unprimeable number, because it can be changed into a prime (225503) 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, 37582 + ... + 37587.

It is an arithmetic number, because the mean of its divisors is an integer number (75170).

2²²⁵⁵⁰⁷ is an apocalyptic number.

225507 is a deficient number, since it is larger than the sum of its proper divisors (75173).

225507 is an equidigital number, since it uses as much as digits as its factorization.

225507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75172.

The product of its (nonzero) digits is 700, while the sum is 21.

The square root of 225507 is about 474.8757732292. The cubic root of 225507 is about 60.8676697798.

The spelling of 225507 in words is "two hundred twenty-five thousand, five hundred seven".