225221140 has 12 divisors (see below), whose sum is σ = 472964436. Its totient is φ = 90088448.

The previous prime is 225221137. The next prime is 225221147. The reversal of 225221140 is 41122522.

It can be written as a sum of positive squares in 2 ways, for example, as 76527504 + 148693636 = 8748^2 + 12194^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225221147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5630509 + ... + 5630548.

It is an arithmetic number, because the mean of its divisors is an integer number (39413703).

Almost surely, 2^225221140 is an apocalyptic number.

225221140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225221140 is an abundant number, since it is smaller than the sum of its proper divisors (247743296).

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

225221140 is a wasteful number, since it uses less digits than its factorization.

225221140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11261066 (or 11261064 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 225221140 is about 15007.3695230044. The cubic root of 225221140 is about 608.4193962598.

Adding to 225221140 its reverse (41122522), we get a palindrome (266343662).

The spelling of 225221140 in words is "two hundred twenty-five million, two hundred twenty-one thousand, one hundred forty".