225333333521 has 8 divisors (see below), whose sum is σ = 233131825920. Its totient is φ = 217536733008.

The previous prime is 225333333493. The next prime is 225333333553. The reversal of 225333333521 is 125333333522.

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 225333333521 - 2⁶ = 225333333457 is a prime.

It is a super-2 number, since 2×225333333521² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (225333333571) 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, 228491 + ... + 709136.

It is an arithmetic number, because the mean of its divisors is an integer number (29141478240).

Almost surely, 2^225333333521 is an apocalyptic number.

It is an amenable number.

225333333521 is a deficient number, since it is larger than the sum of its proper divisors (7798492399).

225333333521 is an equidigital number, since it uses as much as digits as its factorization.

225333333521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 945943.

The product of its digits is 145800, while the sum is 35.

Subtracting from 225333333521 its reverse (125333333522), we obtain a palindrome (99999999999).

The spelling of 225333333521 in words is "two hundred twenty-five billion, three hundred thirty-three million, three hundred thirty-three thousand, five hundred twenty-one".