225623531121 has 32 divisors (see below), whose sum is σ = 309826259712. Its totient is φ = 145984849920.

The previous prime is 225623531087. The next prime is 225623531137. The reversal of 225623531121 is 121135326522.

225623531121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 225623531121 - 2¹⁴ = 225623514737 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225623531321) 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 31 ways as a sum of consecutive naturals, for example, 9348756 + ... + 9372858.

It is an arithmetic number, because the mean of its divisors is an integer number (9682070616).

Almost surely, 2^225623531121 is an apocalyptic number.

It is an amenable number.

225623531121 is a deficient number, since it is larger than the sum of its proper divisors (84202728591).

225623531121 is a wasteful number, since it uses less digits than its factorization.

225623531121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24793.

The product of its digits is 21600, while the sum is 33.

Adding to 225623531121 its reverse (121135326522), we get a palindrome (346758857643).

The spelling of 225623531121 in words is "two hundred twenty-five billion, six hundred twenty-three million, five hundred thirty-one thousand, one hundred twenty-one".