225545232140 has 24 divisors (see below), whose sum is σ = 474209557920. Its totient is φ = 90110555648.

The previous prime is 225545232127. The next prime is 225545232173. The reversal of 225545232140 is 41232545522.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 225545232140.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6703877 + ... + 6737436.

It is an arithmetic number, because the mean of its divisors is an integer number (19758731580).

Almost surely, 2^225545232140 is an apocalyptic number.

225545232140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225545232140 is an abundant number, since it is smaller than the sum of its proper divisors (248664325780).

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

225545232140 is a wasteful number, since it uses less digits than its factorization.

225545232140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13442161 (or 13442159 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 35.

Adding to 225545232140 its reverse (41232545522), we get a palindrome (266777777662).

The spelling of 225545232140 in words is "two hundred twenty-five billion, five hundred forty-five million, two hundred thirty-two thousand, one hundred forty".