225425100 has 72 divisors (see below), whose sum is σ = 690612048. Its totient is φ = 56576000.

The previous prime is 225425099. The next prime is 225425107. The reversal of 225425100 is 1524522.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (225425107) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17001 + ... + 27200.

It is an arithmetic number, because the mean of its divisors is an integer number (9591834).

Almost surely, 2^225425100 is an apocalyptic number.

225425100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225425100 is an abundant number, since it is smaller than the sum of its proper divisors (465186948).

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

225425100 is a wasteful number, since it uses less digits than its factorization.

225425100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44235 (or 44228 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 225425100 is about 15014.1633133518. The cubic root of 225425100 is about 608.6030021436.

Adding to 225425100 its reverse (1524522), we get a palindrome (226949622).

The spelling of 225425100 in words is "two hundred twenty-five million, four hundred twenty-five thousand, one hundred".