225420234 has 16 divisors (see below), whose sum is σ = 485520672. Its totient is φ = 69360048.

The previous prime is 225420203. The next prime is 225420343. The reversal of 225420234 is 432024522.

It is a happy number.

It is a super-2 number, since 2×225420234² = 101628563793229512, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1444924 + ... + 1445079.

It is an arithmetic number, because the mean of its divisors is an integer number (30345042).

Almost surely, 2^225420234 is an apocalyptic number.

225420234 is an abundant number, since it is smaller than the sum of its proper divisors (260100438).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225420234 is a wasteful number, since it uses less digits than its factorization.

225420234 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2890021.

The product of its (nonzero) digits is 3840, while the sum is 24.

The square root of 225420234 is about 15014.0012654855. The cubic root of 225420234 is about 608.5986230342.

Adding to 225420234 its reverse (432024522), we get a palindrome (657444756).

The spelling of 225420234 in words is "two hundred twenty-five million, four hundred twenty thousand, two hundred thirty-four".