225222140 has 72 divisors (see below), whose sum is σ = 559940640. Its totient is φ = 75588480.

The previous prime is 225222139. The next prime is 225222163. The reversal of 225222140 is 41222522.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 27881 + ... + 35039.

Almost surely, 2^225222140 is an apocalyptic number.

225222140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225222140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (279970320).

225222140 is an abundant number, since it is smaller than the sum of its proper divisors (334718500).

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

225222140 is a wasteful number, since it uses less digits than its factorization.

225222140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7203 (or 7190 counting only the distinct ones).

The product of its (nonzero) digits is 640, while the sum is 20.

The square root of 225222140 is about 15007.4028399320. The cubic root of 225222140 is about 608.4202967355.

Adding to 225222140 its reverse (41222522), we get a palindrome (266444662).

The spelling of 225222140 in words is "two hundred twenty-five million, two hundred twenty-two thousand, one hundred forty".