225857 has 4 divisors (see below), whose sum is σ = 229296. Its totient is φ = 222420.

The previous prime is 225839. The next prime is 225859. The reversal of 225857 is 758522.

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 a cyclic number.

It is not a de Polignac number, because 225857 - 2⁸ = 225601 is a prime.

It is a super-2 number, since 2×225857² = 102022768898, which contains 22 as substring.

It is a Duffinian number.

It is a nialpdrome in base 12.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 225857.

It is not an unprimeable number, because it can be changed into a prime (225859) 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, 1619 + ... + 1752.

It is an arithmetic number, because the mean of its divisors is an integer number (57324).

2²²⁵⁸⁵⁷ is an apocalyptic number.

It is an amenable number.

225857 is a deficient number, since it is larger than the sum of its proper divisors (3439).

225857 is an equidigital number, since it uses as much as digits as its factorization.

225857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3438.

The product of its digits is 5600, while the sum is 29.

The square root of 225857 is about 475.2441477809. The cubic root of 225857 is about 60.8991435587.

The spelling of 225857 in words is "two hundred twenty-five thousand, eight hundred fifty-seven".