225653 has 4 divisors (see below), whose sum is σ = 235488. Its totient is φ = 215820.

The previous prime is 225637. The next prime is 225671. The reversal of 225653 is 356522.

It is a happy number.

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: 356522 = 2 ⋅178261.

It is a cyclic number.

It is not a de Polignac number, because 225653 - 2⁴ = 225637 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 9811 = 225653 / (2 + 2 + 5 + 6 + 5 + 3).

It is an Ulam number.

It is a d-powerful number, because it can be written as 2¹³ + 2¹⁵ + 6⁴ + 5⁵ + 5⁵ + 3¹¹ .

It is a Duffinian number.

It is a plaindrome in base 11.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225613) 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, 4883 + ... + 4928.

It is an arithmetic number, because the mean of its divisors is an integer number (58872).

2²²⁵⁶⁵³ is an apocalyptic number.

225653 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

225653 is a deficient number, since it is larger than the sum of its proper divisors (9835).

225653 is an equidigital number, since it uses as much as digits as its factorization.

225653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9834.

The product of its digits is 1800, while the sum is 23.

The square root of 225653 is about 475.0294727698. The cubic root of 225653 is about 60.8808027980.

It can be divided in two parts, 225 and 653, that added together give a palindrome (878).

The spelling of 225653 in words is "two hundred twenty-five thousand, six hundred fifty-three".