225653221540 has 48 divisors (see below), whose sum is σ = 485432930304. Its totient is φ = 88082467200.

The previous prime is 225653221523. The next prime is 225653221543. The reversal of 225653221540 is 45122356522.

225653221540 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 225653221540.

It is not an unprimeable number, because it can be changed into a prime (225653221543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 573256 + ... + 883135.

It is an arithmetic number, because the mean of its divisors is an integer number (10113186048).

Almost surely, 2^225653221540 is an apocalyptic number.

225653221540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225653221540 is an abundant number, since it is smaller than the sum of its proper divisors (259779708764).

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

225653221540 is a wasteful number, since it uses less digits than its factorization.

225653221540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1456588 (or 1456586 counting only the distinct ones).

The product of its (nonzero) digits is 144000, while the sum is 37.

The spelling of 225653221540 in words is "two hundred twenty-five billion, six hundred fifty-three million, two hundred twenty-one thousand, five hundred forty".