225573767375521 has 8 divisors (see below), whose sum is σ = 231624439677288. Its totient is φ = 219549231888000.

The previous prime is 225573767375497. The next prime is 225573767375531. The reversal of 225573767375521 is 125573767375522.

It can be written as a sum of positive squares in 4 ways, for example, as 44769815550625 + 180803951824896 = 6691025^2 + 13446336^2 .

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 225573767375521 - 2¹¹ = 225573767373473 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225573767375531) 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, 6534186070 + ... + 6534220591.

It is an arithmetic number, because the mean of its divisors is an integer number (28953054959661).

Almost surely, 2^{225573767375521} is an apocalyptic number.

It is an amenable number.

225573767375521 is a deficient number, since it is larger than the sum of its proper divisors (6050672301767).

225573767375521 is a wasteful number, since it uses less digits than its factorization.

225573767375521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13068407123.

The product of its digits is 648270000, while the sum is 67.

Subtracting from 225573767375521 its reverse (125573767375522), we obtain a palindrome (99999999999999).

The spelling of 225573767375521 in words is "two hundred twenty-five trillion, five hundred seventy-three billion, seven hundred sixty-seven million, three hundred seventy-five thousand, five hundred twenty-one".