225557 has 4 divisors (see below), whose sum is σ = 229440. Its totient is φ = 221676.

The previous prime is 225529. The next prime is 225569. The reversal of 225557 is 755522.

225557 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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: 755522 = 2 ⋅377761.

It is a cyclic number.

It is not a de Polignac number, because 225557 - 2⁶ = 225493 is a prime.

It is a Duffinian number.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225527) 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, 1853 + ... + 1970.

It is an arithmetic number, because the mean of its divisors is an integer number (57360).

2²²⁵⁵⁵⁷ is an apocalyptic number.

It is an amenable number.

225557 is a deficient number, since it is larger than the sum of its proper divisors (3883).

225557 is an equidigital number, since it uses as much as digits as its factorization.

225557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3882.

The product of its digits is 3500, while the sum is 26.

The square root of 225557 is about 474.9284156586. The cubic root of 225557 is about 60.8721680268.

The spelling of 225557 in words is "two hundred twenty-five thousand, five hundred fifty-seven".