225638430 has 16 divisors (see below), whose sum is σ = 541532304. Its totient is φ = 60170240.

The previous prime is 225638389. The next prime is 225638431. The reversal of 225638430 is 34836522.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 225638391 and 225638400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225638431) 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, 3760611 + ... + 3760670.

It is an arithmetic number, because the mean of its divisors is an integer number (33845769).

Almost surely, 2^225638430 is an apocalyptic number.

225638430 is an abundant number, since it is smaller than the sum of its proper divisors (315893874).

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

225638430 is a wasteful number, since it uses less digits than its factorization.

225638430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7521291.

The product of its (nonzero) digits is 34560, while the sum is 33.

The square root of 225638430 is about 15021.2659253473. The cubic root of 225638430 is about 608.7949244927.

The spelling of 225638430 in words is "two hundred twenty-five million, six hundred thirty-eight thousand, four hundred thirty".