225434420 has 24 divisors (see below), whose sum is σ = 473833248. Its totient is φ = 90093600.

The previous prime is 225434413. The next prime is 225434437. The reversal of 225434420 is 24434522.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 225434420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21455 + ... + 30185.

It is an arithmetic number, because the mean of its divisors is an integer number (19743052).

Almost surely, 2^225434420 is an apocalyptic number.

225434420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225434420 is an abundant number, since it is smaller than the sum of its proper divisors (248398828).

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

225434420 is a wasteful number, since it uses less digits than its factorization.

225434420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10031 (or 10029 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 26.

The square root of 225434420 is about 15014.4736837493. The cubic root of 225434420 is about 608.6113894110.

Adding to 225434420 its reverse (24434522), we get a palindrome (249868942).

The spelling of 225434420 in words is "two hundred twenty-five million, four hundred thirty-four thousand, four hundred twenty".