225351666 has 64 divisors (see below), whose sum is σ = 529920000. Its totient is φ = 70788816.

The previous prime is 225351653. The next prime is 225351667. The reversal of 225351666 is 666153522.

It is a happy number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 225351666.

It is not an unprimeable number, because it can be changed into a prime (225351667) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 244755 + ... + 245673.

It is an arithmetic number, because the mean of its divisors is an integer number (8280000).

Almost surely, 2^225351666 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225351666, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264960000).

225351666 is an abundant number, since it is smaller than the sum of its proper divisors (304568334).

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

225351666 is a wasteful number, since it uses less digits than its factorization.

225351666 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 1182 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 225351666 is about 15011.7176232435. The cubic root of 225351666 is about 608.5369092275.

The spelling of 225351666 in words is "two hundred twenty-five million, three hundred fifty-one thousand, six hundred sixty-six".