225420231 has 8 divisors (see below), whose sum is σ = 300639744. Its totient is φ = 150240440.

The previous prime is 225420203. The next prime is 225420343. The reversal of 225420231 is 132024522.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225420231 - 2¹⁹ = 224895943 is a prime.

It is a super-2 number, since 2×225420231² = 101628561088186722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 225420198 and 225420207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225420031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7876 + ... + 22646.

It is an arithmetic number, because the mean of its divisors is an integer number (37579968).

Almost surely, 2^225420231 is an apocalyptic number.

225420231 is a deficient number, since it is larger than the sum of its proper divisors (75219513).

225420231 is a wasteful number, since it uses less digits than its factorization.

225420231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19861.

The product of its (nonzero) digits is 960, while the sum is 21.

The square root of 225420231 is about 15014.0011655787. The cubic root of 225420231 is about 608.5986203343.

Adding to 225420231 its reverse (132024522), we get a palindrome (357444753).

The spelling of 225420231 in words is "two hundred twenty-five million, four hundred twenty thousand, two hundred thirty-one".