225537528540 has 48 divisors (see below), whose sum is σ = 644941366272. Its totient is φ = 58863694656.

The previous prime is 225537528521. The next prime is 225537528563. The reversal of 225537528540 is 45825735522.

It is a self number, because there is not a number n which added to its sum of digits gives 225537528540.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 39986104 + ... + 39991743.

It is an arithmetic number, because the mean of its divisors is an integer number (13436278464).

Almost surely, 2^225537528540 is an apocalyptic number.

225537528540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

225537528540 is an abundant number, since it is smaller than the sum of its proper divisors (419403837732).

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

225537528540 is a wasteful number, since it uses less digits than its factorization.

225537528540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79977906 (or 79977904 counting only the distinct ones).

The product of its (nonzero) digits is 3360000, while the sum is 48.

The spelling of 225537528540 in words is "two hundred twenty-five billion, five hundred thirty-seven million, five hundred twenty-eight thousand, five hundred forty".