225187 has 4 divisors (see below), whose sum is σ = 228616. Its totient is φ = 221760.

The previous prime is 225167. The next prime is 225217. The reversal of 225187 is 781522.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225187 is a prime.

It is a Duffinian number.

225187 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (225157) 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, 1614 + ... + 1747.

It is an arithmetic number, because the mean of its divisors is an integer number (57154).

2²²⁵¹⁸⁷ is an apocalyptic number.

225187 is a deficient number, since it is larger than the sum of its proper divisors (3429).

225187 is an equidigital number, since it uses as much as digits as its factorization.

225187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3428.

The product of its digits is 1120, while the sum is 25.

The square root of 225187 is about 474.5387233936. The cubic root of 225187 is about 60.8388652420.

The spelling of 225187 in words is "two hundred twenty-five thousand, one hundred eighty-seven".