225672311721 has 16 divisors (see below), whose sum is σ = 310815825920. Its totient is φ = 145495161360.

The previous prime is 225672311719. The next prime is 225672311723. The reversal of 225672311721 is 127113276522.

225672311721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (225672311719) and next prime (225672311723).

It is not a de Polignac number, because 225672311721 - 2¹ = 225672311719 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225672311721.

It is not an unprimeable number, because it can be changed into a prime (225672311723) 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 15 ways as a sum of consecutive naturals, for example, 695905 + ... + 967278.

It is an arithmetic number, because the mean of its divisors is an integer number (19425989120).

Almost surely, 2^225672311721 is an apocalyptic number.

It is an amenable number.

225672311721 is a deficient number, since it is larger than the sum of its proper divisors (85143514199).

225672311721 is a wasteful number, since it uses less digits than its factorization.

225672311721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1664676.

The product of its digits is 70560, while the sum is 39.

The spelling of 225672311721 in words is "two hundred twenty-five billion, six hundred seventy-two million, three hundred eleven thousand, seven hundred twenty-one".