225501 has 4 divisors (see below), whose sum is σ = 300672. Its totient is φ = 150332.

The previous prime is 225499. The next prime is 225503. The reversal of 225501 is 105522.

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.

It is an interprime number because it is at equal distance from previous prime (225499) and next prime (225503).

It is a cyclic number.

It is not a de Polignac number, because 225501 - 2¹ = 225499 is a prime.

It is a D-number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 225501.

It is not an unprimeable number, because it can be changed into a prime (225503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37581 + ... + 37586.

It is an arithmetic number, because the mean of its divisors is an integer number (75168).

2²²⁵⁵⁰¹ is an apocalyptic number.

It is an amenable number.

225501 is a deficient number, since it is larger than the sum of its proper divisors (75171).

225501 is an equidigital number, since it uses as much as digits as its factorization.

225501 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75170.

The product of its (nonzero) digits is 100, while the sum is 15.

The square root of 225501 is about 474.8694557455. The cubic root of 225501 is about 60.8671299455.

The spelling of 225501 in words is "two hundred twenty-five thousand, five hundred one".