225840511721 has 8 divisors (see below), whose sum is σ = 246394713504. Its totient is φ = 205290184320.

The previous prime is 225840511691. The next prime is 225840511723. The reversal of 225840511721 is 127115048522.

225840511721 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 225840511721 - 2²² = 225836317417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225840511723) 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 7 ways as a sum of consecutive naturals, for example, 846035 + ... + 1080488.

It is an arithmetic number, because the mean of its divisors is an integer number (30799339188).

Almost surely, 2^225840511721 is an apocalyptic number.

It is an amenable number.

225840511721 is a deficient number, since it is larger than the sum of its proper divisors (20554201783).

225840511721 is a wasteful number, since it uses less digits than its factorization.

225840511721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937191.

The product of its (nonzero) digits is 44800, while the sum is 38.

The spelling of 225840511721 in words is "two hundred twenty-five billion, eight hundred forty million, five hundred eleven thousand, seven hundred twenty-one".