225252323252521 has 8 divisors (see below), whose sum is σ = 238535534854944. Its totient is φ = 211972786643520.

The previous prime is 225252323252519. The next prime is 225252323252557. The reversal of 225252323252521 is 125252323252522.

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 225252323252521 - 2¹ = 225252323252519 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225252323252921) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 918622155 + ... + 918867328.

It is an arithmetic number, because the mean of its divisors is an integer number (29816941856868).

Almost surely, 2^{225252323252521} is an apocalyptic number.

It is an amenable number.

225252323252521 is a deficient number, since it is larger than the sum of its proper divisors (13283211602423).

225252323252521 is a wasteful number, since it uses less digits than its factorization.

225252323252521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1837496711.

The product of its digits is 1440000, while the sum is 43.

Subtracting from 225252323252521 its reverse (125252323252522), we obtain a palindrome (99999999999999).

The spelling of 225252323252521 in words is "two hundred twenty-five trillion, two hundred fifty-two billion, three hundred twenty-three million, two hundred fifty-two thousand, five hundred twenty-one".