225685984165 has 8 divisors (see below), whose sum is σ = 272548170360. Its totient is φ = 179398794432.

The previous prime is 225685984157. The next prime is 225685984247. The reversal of 225685984165 is 561489586522.

It can be written as a sum of positive squares in 4 ways, for example, as 1569902884 + 224116081281 = 39622^2 + 473409^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 225685984165 - 2³ = 225685984157 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 143748250 + ... + 143749819.

It is an arithmetic number, because the mean of its divisors is an integer number (34068521295).

Almost surely, 2^225685984165 is an apocalyptic number.

It is an amenable number.

225685984165 is a deficient number, since it is larger than the sum of its proper divisors (46862186195).

225685984165 is a wasteful number, since it uses less digits than its factorization.

225685984165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 287498231.

The product of its digits is 41472000, while the sum is 61.

The spelling of 225685984165 in words is "two hundred twenty-five billion, six hundred eighty-five million, nine hundred eighty-four thousand, one hundred sixty-five".