225421456 has 20 divisors (see below), whose sum is σ = 470350972. Its totient is φ = 104040576.

The previous prime is 225421451. The next prime is 225421463. The reversal of 225421456 is 654124522.

225421456 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 79495056 + 145926400 = 8916^2 + 12080^2 .

It is not an unprimeable number, because it can be changed into a prime (225421451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 541671 + ... + 542086.

Almost surely, 2^225421456 is an apocalyptic number.

225421456 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

225421456 is an abundant number, since it is smaller than the sum of its proper divisors (244929516).

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

225421456 is a wasteful number, since it uses less digits than its factorization.

225421456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1083778 (or 1083772 counting only the distinct ones).

The product of its digits is 19200, while the sum is 31.

The square root of 225421456 is about 15014.0419607779. The cubic root of 225421456 is about 608.5997227671.

Adding to 225421456 its reverse (654124522), we get a palindrome (879545978).

The spelling of 225421456 in words is "two hundred twenty-five million, four hundred twenty-one thousand, four hundred fifty-six".