225513241521 has 4 divisors (see below), whose sum is σ = 300684322032. Its totient is φ = 150342161012.

The previous prime is 225513241511. The next prime is 225513241543. The reversal of 225513241521 is 125142315522.

225513241521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 225513241521 - 2¹⁰ = 225513240497 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225513241511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 37585540251 + ... + 37585540256.

It is an arithmetic number, because the mean of its divisors is an integer number (75171080508).

Almost surely, 2^225513241521 is an apocalyptic number.

It is an amenable number.

225513241521 is a deficient number, since it is larger than the sum of its proper divisors (75171080511).

225513241521 is an equidigital number, since it uses as much as digits as its factorization.

225513241521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75171080510.

The product of its digits is 24000, while the sum is 33.

The spelling of 225513241521 in words is "two hundred twenty-five billion, five hundred thirteen million, two hundred forty-one thousand, five hundred twenty-one".