225661171530 has 32 divisors (see below), whose sum is σ = 559057356288. Its totient is φ = 58235140800.

The previous prime is 225661171517. The next prime is 225661171577. The reversal of 225661171530 is 35171166522.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121322281 + ... + 121324140.

It is an arithmetic number, because the mean of its divisors is an integer number (17470542384).

Almost surely, 2^225661171530 is an apocalyptic number.

225661171530 is an abundant number, since it is smaller than the sum of its proper divisors (333396184758).

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

225661171530 is a wasteful number, since it uses less digits than its factorization.

225661171530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 242646462.

The product of its (nonzero) digits is 75600, while the sum is 39.

The spelling of 225661171530 in words is "two hundred twenty-five billion, six hundred sixty-one million, one hundred seventy-one thousand, five hundred thirty".