225666423 has 24 divisors (see below), whose sum is σ = 331269120. Its totient is φ = 148009680.

The previous prime is 225666407. The next prime is 225666437. The reversal of 225666423 is 324666522.

It is not a de Polignac number, because 225666423 - 2⁴ = 225666407 is a prime.

It is a super-2 number, since 2×225666423² = 101850668939229858, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225666403) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 357318 + ... + 357948.

It is an arithmetic number, because the mean of its divisors is an integer number (13802880).

Almost surely, 2^225666423 is an apocalyptic number.

225666423 is a deficient number, since it is larger than the sum of its proper divisors (105602697).

225666423 is a wasteful number, since it uses less digits than its factorization.

225666423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1219 (or 1216 counting only the distinct ones).

The product of its digits is 103680, while the sum is 36.

The square root of 225666423 is about 15022.1976754402. The cubic root of 225666423 is about 608.8200994177.

Subtracting 225666423 from its reverse (324666522), we obtain a palindrome (99000099).

The spelling of 225666423 in words is "two hundred twenty-five million, six hundred sixty-six thousand, four hundred twenty-three".